diff --git a/node_modules/is-callable/.editorconfig b/node_modules/is-callable/.editorconfig
new file mode 100644
index 0000000..4623631
--- /dev/null
+++ b/node_modules/is-callable/.editorconfig
@@ -0,0 +1,21 @@
+root = true
+
+[*]
+indent_style = tab
+indent_size = 4
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+max_line_length = 150
+
+[CHANGELOG.md]
+indent_style = space
+indent_size = 2
+max_line_length = off
+
+[*.json]
+max_line_length = off
+
+[Makefile]
+max_line_length = off
diff --git a/node_modules/is-callable/.eslintignore b/node_modules/is-callable/.eslintignore
new file mode 100644
index 0000000..404abb2
--- /dev/null
+++ b/node_modules/is-callable/.eslintignore
@@ -0,0 +1 @@
+coverage/
diff --git a/node_modules/is-callable/.eslintrc b/node_modules/is-callable/.eslintrc
new file mode 100644
index 0000000..631b8f3
--- /dev/null
+++ b/node_modules/is-callable/.eslintrc
@@ -0,0 +1,21 @@
+{
+	"root": true,
+
+	"extends": "@ljharb",
+
+	"rules": {
+		"id-length": 0,
+		"max-statements": [2, 14],
+		"max-statements-per-line": [2, { "max": 2 }],
+		"operator-linebreak": [2, "before"],
+	},
+
+	"overrides": [
+		{
+			"files": "test/**",
+			"rules": {
+				"no-throw-literal": 0,
+			},
+		},
+	],
+}
diff --git a/node_modules/is-callable/.github/FUNDING.yml b/node_modules/is-callable/.github/FUNDING.yml
new file mode 100644
index 0000000..0fdebd0
--- /dev/null
+++ b/node_modules/is-callable/.github/FUNDING.yml
@@ -0,0 +1,12 @@
+# These are supported funding model platforms
+
+github: [ljharb]
+patreon: # Replace with a single Patreon username
+open_collective: # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: npm/is-callable
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+liberapay: # Replace with a single Liberapay username
+issuehunt: # Replace with a single IssueHunt username
+otechie: # Replace with a single Otechie username
+custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']
diff --git a/node_modules/is-callable/.github/main.workflow b/node_modules/is-callable/.github/main.workflow
new file mode 100644
index 0000000..0494481
--- /dev/null
+++ b/node_modules/is-callable/.github/main.workflow
@@ -0,0 +1,14 @@
+workflow "Autorebase branch on merge commits" {
+	on = "push"
+	resolves = ["rebase"]
+}
+
+workflow "Autorebase PR on merge commits" {
+	on = "pull_request"
+	resolves = ["rebase"]
+}
+
+ action "rebase" {
+	uses = "ljharb/rebase@latest"
+	secrets = ["GITHUB_TOKEN"]
+}
diff --git a/node_modules/is-callable/.istanbul.yml b/node_modules/is-callable/.istanbul.yml
new file mode 100644
index 0000000..9affe0b
--- /dev/null
+++ b/node_modules/is-callable/.istanbul.yml
@@ -0,0 +1,47 @@
+verbose: false
+instrumentation:
+    root: .
+    extensions:
+        - .js
+        - .jsx
+    default-excludes: true
+    excludes: []
+    variable: __coverage__
+    compact: true
+    preserve-comments: false
+    complete-copy: false
+    save-baseline: false
+    baseline-file: ./coverage/coverage-baseline.raw.json
+    include-all-sources: false
+    include-pid: false
+    es-modules: false
+    auto-wrap: false
+reporting:
+    print: summary
+    reports:
+        - html
+    dir: ./coverage
+    summarizer: pkg
+    report-config: {}
+    watermarks:
+        statements: [50, 80]
+        functions: [50, 80]
+        branches: [50, 80]
+        lines: [50, 80]
+hooks:
+    hook-run-in-context: false
+    post-require-hook: null
+    handle-sigint: false
+check:
+    global:
+        statements: 100
+        lines: 100
+        branches: 100
+        functions: 100
+        excludes: []
+    each:
+        statements: 100
+        lines: 100
+        branches: 100
+        functions: 100
+        excludes: []
diff --git a/node_modules/is-callable/.nycrc b/node_modules/is-callable/.nycrc
new file mode 100644
index 0000000..1826526
--- /dev/null
+++ b/node_modules/is-callable/.nycrc
@@ -0,0 +1,13 @@
+{
+	"all": true,
+	"check-coverage": false,
+	"reporter": ["text-summary", "text", "html", "json"],
+	"lines": 86,
+	"statements": 85.93,
+	"functions": 82.43,
+	"branches": 76.06,
+	"exclude": [
+		"coverage",
+		"test"
+	]
+}
diff --git a/node_modules/is-callable/CHANGELOG.md b/node_modules/is-callable/CHANGELOG.md
new file mode 100644
index 0000000..6b88f5b
--- /dev/null
+++ b/node_modules/is-callable/CHANGELOG.md
@@ -0,0 +1,94 @@
+1.2.3 / 2021-01-31
+=================
+  * [Fix] `document.all` is callable (do not use `document.all`!)
+  * [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `aud`, `tape`
+  * [Tests] migrate tests to Github Actions
+  * [actions] add "Allow Edits" workflow
+  * [actions] switch Automatic Rebase workflow to `pull_request_target` event
+
+1.2.2 / 2020-09-21
+=================
+  * [Fix] include actual fix from 579179e
+  * [Dev Deps] update `eslint`
+
+1.2.1 / 2020-09-09
+=================
+  * [Fix] phantomjs‘ Reflect.apply does not throw properly on a bad array-like
+  * [Dev Deps] update `eslint`, `@ljharb/eslint-config`
+  * [meta] fix eclint error
+
+1.2.0 / 2020-06-02
+=================
+  * [New] use `Reflect.apply`‑based callability detection
+  * [readme] add install instructions (#55)
+  * [meta] only run `aud` on prod deps
+  * [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `tape`, `make-arrow-function`, `make-generator-function`; add `aud`, `safe-publish-latest`, `make-async-function`
+  * [Tests] add tests for function proxies (#53, #25)
+
+1.1.5 / 2019-12-18
+=================
+  * [meta] remove unused Makefile and associated utilities
+  * [meta] add `funding` field; add FUNDING.yml
+  * [Dev Deps] update `eslint`, `@ljharb/eslint-config`, `semver`, `tape`, `covert`, `rimraf`
+  * [Tests] use shared travis configs
+  * [Tests] use `eccheck` over `editorconfig-tools`
+  * [Tests] use `npx aud` instead of `nsp` or `npm audit` with hoops
+  * [Tests] remove `jscs`
+  * [actions] add automatic rebasing / merge commit blocking
+
+1.1.4 / 2018-07-02
+=================
+  * [Fix] improve `class` and arrow function detection (#30, #31)
+  * [Tests] on all latest node minors; improve matrix
+  * [Dev Deps] update all dev deps
+
+1.1.3 / 2016-02-27
+=================
+  * [Fix] ensure “class “ doesn’t screw up “class” detection
+  * [Tests] up to `node` `v5.7`, `v4.3`
+  * [Dev Deps] update to `eslint` v2, `@ljharb/eslint-config`, `jscs`
+
+1.1.2 / 2016-01-15
+=================
+  * [Fix] Make sure comments don’t screw up “class” detection (#4)
+  * [Tests] up to `node` `v5.3`
+  * [Tests] Add `parallelshell`, run both `--es-staging` and stock tests at once
+  * [Dev Deps] update `tape`, `jscs`, `nsp`, `eslint`, `@ljharb/eslint-config`
+  * [Refactor] convert `isNonES6ClassFn` into `isES6ClassFn`
+
+1.1.1 / 2015-11-30
+=================
+  * [Fix] do not throw when a non-function has a function in its [[Prototype]] (#2)
+  * [Dev Deps] update `tape`, `eslint`, `@ljharb/eslint-config`, `jscs`, `nsp`, `semver`
+  * [Tests] up to `node` `v5.1`
+  * [Tests] no longer allow node 0.8 to fail.
+  * [Tests] fix npm upgrades in older nodes
+
+1.1.0 / 2015-10-02
+=================
+  * [Fix] Some browsers report TypedArray constructors as `typeof object`
+  * [New] return false for "class" constructors, when possible.
+  * [Tests] up to `io.js` `v3.3`, `node` `v4.1`
+  * [Dev Deps] update `eslint`, `editorconfig-tools`, `nsp`, `tape`, `semver`, `jscs`, `covert`, `make-arrow-function`
+  * [Docs] Switch from vb.teelaun.ch to versionbadg.es for the npm version badge SVG
+
+1.0.4 / 2015-01-30
+=================
+  * If @@toStringTag is not present, use the old-school Object#toString test.
+
+1.0.3 / 2015-01-29
+=================
+  * Add tests to ensure arrow functions are callable.
+  * Refactor to aid optimization of non-try/catch code.
+
+1.0.2 / 2015-01-29
+=================
+  * Fix broken package.json
+
+1.0.1 / 2015-01-29
+=================
+  * Add early exit for typeof not "function"
+
+1.0.0 / 2015-01-29
+=================
+  * Initial release.
diff --git a/node_modules/is-callable/LICENSE b/node_modules/is-callable/LICENSE
new file mode 100644
index 0000000..b43df44
--- /dev/null
+++ b/node_modules/is-callable/LICENSE
@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 Jordan Harband
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
diff --git a/node_modules/is-callable/README.md b/node_modules/is-callable/README.md
new file mode 100644
index 0000000..b5c965c
--- /dev/null
+++ b/node_modules/is-callable/README.md
@@ -0,0 +1,68 @@
+# is-callable <sup>[![Version Badge][2]][1]</sup>
+
+[![Build Status][3]][4]
+[![dependency status][5]][6]
+[![dev dependency status][7]][8]
+[![License][license-image]][license-url]
+[![Downloads][downloads-image]][downloads-url]
+
+[![npm badge][11]][1]
+
+[![browser support][9]][10]
+
+Is this JS value callable? Works with Functions and GeneratorFunctions, despite ES6 @@toStringTag.
+
+## Example
+
+```js
+var isCallable = require('is-callable');
+var assert = require('assert');
+
+assert.notOk(isCallable(undefined));
+assert.notOk(isCallable(null));
+assert.notOk(isCallable(false));
+assert.notOk(isCallable(true));
+assert.notOk(isCallable([]));
+assert.notOk(isCallable({}));
+assert.notOk(isCallable(/a/g));
+assert.notOk(isCallable(new RegExp('a', 'g')));
+assert.notOk(isCallable(new Date()));
+assert.notOk(isCallable(42));
+assert.notOk(isCallable(NaN));
+assert.notOk(isCallable(Infinity));
+assert.notOk(isCallable(new Number(42)));
+assert.notOk(isCallable('foo'));
+assert.notOk(isCallable(Object('foo')));
+
+assert.ok(isCallable(function () {}));
+assert.ok(isCallable(function* () {}));
+assert.ok(isCallable(x => x * x));
+```
+
+## Install
+
+Install with
+
+```
+npm install is-callable
+```
+
+## Tests
+
+Simply clone the repo, `npm install`, and run `npm test`
+
+[1]: https://npmjs.org/package/is-callable
+[2]: http://versionbadg.es/ljharb/is-callable.svg
+[3]: https://travis-ci.org/ljharb/is-callable.svg
+[4]: https://travis-ci.org/ljharb/is-callable
+[5]: https://david-dm.org/ljharb/is-callable.svg
+[6]: https://david-dm.org/ljharb/is-callable
+[7]: https://david-dm.org/ljharb/is-callable/dev-status.svg
+[8]: https://david-dm.org/ljharb/is-callable#info=devDependencies
+[9]: https://ci.testling.com/ljharb/is-callable.png
+[10]: https://ci.testling.com/ljharb/is-callable
+[11]: https://nodei.co/npm/is-callable.png?downloads=true&stars=true
+[license-image]: http://img.shields.io/npm/l/is-callable.svg
+[license-url]: LICENSE
+[downloads-image]: http://img.shields.io/npm/dm/is-callable.svg
+[downloads-url]: http://npm-stat.com/charts.html?package=is-callable
diff --git a/node_modules/is-callable/index.js b/node_modules/is-callable/index.js
new file mode 100644
index 0000000..f36d71d
--- /dev/null
+++ b/node_modules/is-callable/index.js
@@ -0,0 +1,74 @@
+'use strict';
+
+var fnToStr = Function.prototype.toString;
+var reflectApply = typeof Reflect === 'object' && Reflect !== null && Reflect.apply;
+var badArrayLike;
+var isCallableMarker;
+if (typeof reflectApply === 'function' && typeof Object.defineProperty === 'function') {
+	try {
+		badArrayLike = Object.defineProperty({}, 'length', {
+			get: function () {
+				throw isCallableMarker;
+			}
+		});
+		isCallableMarker = {};
+		// eslint-disable-next-line no-throw-literal
+		reflectApply(function () { throw 42; }, null, badArrayLike);
+	} catch (_) {
+		if (_ !== isCallableMarker) {
+			reflectApply = null;
+		}
+	}
+} else {
+	reflectApply = null;
+}
+
+var constructorRegex = /^\s*class\b/;
+var isES6ClassFn = function isES6ClassFunction(value) {
+	try {
+		var fnStr = fnToStr.call(value);
+		return constructorRegex.test(fnStr);
+	} catch (e) {
+		return false; // not a function
+	}
+};
+
+var tryFunctionObject = function tryFunctionToStr(value) {
+	try {
+		if (isES6ClassFn(value)) { return false; }
+		fnToStr.call(value);
+		return true;
+	} catch (e) {
+		return false;
+	}
+};
+var toStr = Object.prototype.toString;
+var fnClass = '[object Function]';
+var genClass = '[object GeneratorFunction]';
+var hasToStringTag = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';
+/* globals document: false */
+var documentDotAll = typeof document === 'object' && typeof document.all === 'undefined' && document.all !== undefined ? document.all : {};
+
+module.exports = reflectApply
+	? function isCallable(value) {
+		if (value === documentDotAll) { return true; }
+		if (!value) { return false; }
+		if (typeof value !== 'function' && typeof value !== 'object') { return false; }
+		if (typeof value === 'function' && !value.prototype) { return true; }
+		try {
+			reflectApply(value, null, badArrayLike);
+		} catch (e) {
+			if (e !== isCallableMarker) { return false; }
+		}
+		return !isES6ClassFn(value);
+	}
+	: function isCallable(value) {
+		if (value === documentDotAll) { return true; }
+		if (!value) { return false; }
+		if (typeof value !== 'function' && typeof value !== 'object') { return false; }
+		if (typeof value === 'function' && !value.prototype) { return true; }
+		if (hasToStringTag) { return tryFunctionObject(value); }
+		if (isES6ClassFn(value)) { return false; }
+		var strClass = toStr.call(value);
+		return strClass === fnClass || strClass === genClass;
+	};
diff --git a/node_modules/is-callable/package.json b/node_modules/is-callable/package.json
new file mode 100644
index 0000000..07edd78
--- /dev/null
+++ b/node_modules/is-callable/package.json
@@ -0,0 +1,130 @@
+{
+  "_from": "is-callable@^1.2.3",
+  "_id": "is-callable@1.2.3",
+  "_inBundle": false,
+  "_integrity": "sha512-J1DcMe8UYTBSrKezuIUTUwjXsho29693unXM2YhJUTR2txK/eG47bvNa/wipPFmZFgr/N6f1GA66dv0mEyTIyQ==",
+  "_location": "/is-callable",
+  "_phantomChildren": {},
+  "_requested": {
+    "type": "range",
+    "registry": true,
+    "raw": "is-callable@^1.2.3",
+    "name": "is-callable",
+    "escapedName": "is-callable",
+    "rawSpec": "^1.2.3",
+    "saveSpec": null,
+    "fetchSpec": "^1.2.3"
+  },
+  "_requiredBy": [
+    "/es-abstract",
+    "/es-to-primitive"
+  ],
+  "_resolved": "https://registry.npmjs.org/is-callable/-/is-callable-1.2.3.tgz",
+  "_shasum": "8b1e0500b73a1d76c70487636f368e519de8db8e",
+  "_spec": "is-callable@^1.2.3",
+  "_where": "C:\\Users\\marcr\\Desktop\\KorAp\\Git\\Kalamar\\node_modules\\es-abstract",
+  "author": {
+    "name": "Jordan Harband",
+    "email": "ljharb@gmail.com",
+    "url": "http://ljharb.codes"
+  },
+  "bugs": {
+    "url": "https://github.com/ljharb/is-callable/issues"
+  },
+  "bundleDependencies": false,
+  "contributors": [
+    {
+      "name": "Jordan Harband",
+      "email": "ljharb@gmail.com",
+      "url": "http://ljharb.codes"
+    }
+  ],
+  "dependencies": {},
+  "deprecated": false,
+  "description": "Is this JS value callable? Works with Functions and GeneratorFunctions, despite ES6 @@toStringTag.",
+  "devDependencies": {
+    "@ljharb/eslint-config": "^17.5.0",
+    "aud": "^1.1.3",
+    "covert": "^1.1.1",
+    "eclint": "^2.8.1",
+    "eslint": "^7.19.0",
+    "foreach": "^2.0.5",
+    "istanbul": "1.1.0-alpha.1",
+    "istanbul-merge": "^1.1.1",
+    "make-arrow-function": "^1.2.0",
+    "make-async-function": "^1.0.0",
+    "make-generator-function": "^2.0.0",
+    "rimraf": "^2.7.1",
+    "safe-publish-latest": "^1.1.4",
+    "tape": "^5.1.1"
+  },
+  "engines": {
+    "node": ">= 0.4"
+  },
+  "funding": {
+    "url": "https://github.com/sponsors/ljharb"
+  },
+  "greenkeeper": {
+    "ignore": [
+      "rimraf"
+    ]
+  },
+  "homepage": "https://github.com/ljharb/is-callable#readme",
+  "keywords": [
+    "Function",
+    "function",
+    "callable",
+    "generator",
+    "generator function",
+    "arrow",
+    "arrow function",
+    "ES6",
+    "toStringTag",
+    "@@toStringTag"
+  ],
+  "license": "MIT",
+  "main": "index.js",
+  "name": "is-callable",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/ljharb/is-callable.git"
+  },
+  "scripts": {
+    "coverage": "npm run --silent istanbul",
+    "covert": "covert test",
+    "covert:quiet": "covert test --quiet",
+    "istanbul": "npm run --silent istanbul:clean && npm run --silent istanbul:std && npm run --silent istanbul:harmony && npm run --silent istanbul:merge && istanbul check",
+    "istanbul:clean": "rimraf coverage coverage-std coverage-harmony",
+    "istanbul:harmony": "node --harmony ./node_modules/istanbul/lib/cli.js cover test --dir coverage-harmony",
+    "istanbul:merge": "istanbul-merge --out coverage/coverage.raw.json coverage-harmony/coverage.raw.json coverage-std/coverage.raw.json && istanbul report html",
+    "istanbul:std": "istanbul cover test --report html --dir coverage-std",
+    "lint": "eslint .",
+    "posttest": "npx aud --production",
+    "prelint": "eclint check *",
+    "prepublish": "safe-publish-latest",
+    "pretest": "npm run --silent lint",
+    "test": "npm run --silent tests-only",
+    "test:staging": "node --es-staging test",
+    "test:stock": "node test",
+    "tests-only": "npm run --silent test:stock && npm run --silent test:staging"
+  },
+  "testling": {
+    "files": "test/index.js",
+    "browsers": [
+      "iexplore/6.0..latest",
+      "firefox/3.0..6.0",
+      "firefox/15.0..latest",
+      "firefox/nightly",
+      "chrome/4.0..10.0",
+      "chrome/20.0..latest",
+      "chrome/canary",
+      "opera/10.0..latest",
+      "opera/next",
+      "safari/4.0..latest",
+      "ipad/6.0..latest",
+      "iphone/6.0..latest",
+      "android-browser/4.2"
+    ]
+  },
+  "version": "1.2.3"
+}
diff --git a/node_modules/is-callable/test/index.js b/node_modules/is-callable/test/index.js
new file mode 100644
index 0000000..2eacb0e
--- /dev/null
+++ b/node_modules/is-callable/test/index.js
@@ -0,0 +1,198 @@
+'use strict';
+
+/* globals Proxy */
+/* eslint no-magic-numbers: 1 */
+
+var test = require('tape');
+var isCallable = require('../');
+var hasSymbols = typeof Symbol === 'function' && typeof Symbol('foo') === 'symbol';
+var generators = require('make-generator-function')();
+var arrows = require('make-arrow-function').list();
+var asyncs = require('make-async-function').list();
+var weirdlyCommentedArrowFn;
+try {
+	/* eslint-disable no-new-func */
+	weirdlyCommentedArrowFn = Function('return cl/*/**/=>/**/ass - 1;')();
+	/* eslint-enable no-new-func */
+} catch (e) { /**/ }
+var forEach = require('foreach');
+
+var noop = function () {};
+var classFake = function classFake() { }; // eslint-disable-line func-name-matching
+var returnClass = function () { return ' class '; };
+var return3 = function () { return 3; };
+/* for coverage */
+noop();
+classFake();
+returnClass();
+return3();
+/* end for coverage */
+
+var proxy;
+if (typeof Proxy === 'function') {
+	try {
+		proxy = new Proxy(function () {}, {});
+		// for coverage
+		proxy();
+		String(proxy);
+	} catch (_) {
+		// If `Reflect` is supported, then `Function.prototype.toString` isn't used for callability detection.
+		if (typeof Reflect !== 'object') {
+			// Older engines throw a `TypeError` when `Function.prototype.toString` is called on a Proxy object.
+			proxy = null;
+		}
+	}
+}
+
+var invokeFunction = function invokeFunctionString(str) {
+	var result;
+	try {
+		/* eslint-disable no-new-func */
+		var fn = Function(str);
+		/* eslint-enable no-new-func */
+		result = fn();
+	} catch (e) {}
+	return result;
+};
+
+var classConstructor = invokeFunction('"use strict"; return class Foo {}');
+
+var commentedClass = invokeFunction('"use strict"; return class/*kkk*/\n//blah\n Bar\n//blah\n {}');
+var commentedClassOneLine = invokeFunction('"use strict"; return class/**/A{}');
+var classAnonymous = invokeFunction('"use strict"; return class{}');
+var classAnonymousCommentedOneLine = invokeFunction('"use strict"; return class/*/*/{}');
+
+test('not callables', function (t) {
+	t.test('non-number/string primitives', function (st) {
+		st.notOk(isCallable(), 'undefined is not callable');
+		st.notOk(isCallable(null), 'null is not callable');
+		st.notOk(isCallable(false), 'false is not callable');
+		st.notOk(isCallable(true), 'true is not callable');
+		st.end();
+	});
+
+	t.notOk(isCallable([]), 'array is not callable');
+	t.notOk(isCallable({}), 'object is not callable');
+	t.notOk(isCallable(/a/g), 'regex literal is not callable');
+	t.notOk(isCallable(new RegExp('a', 'g')), 'regex object is not callable');
+	t.notOk(isCallable(new Date()), 'new Date() is not callable');
+
+	t.test('numbers', function (st) {
+		st.notOk(isCallable(42), 'number is not callable');
+		st.notOk(isCallable(Object(42)), 'number object is not callable');
+		st.notOk(isCallable(NaN), 'NaN is not callable');
+		st.notOk(isCallable(Infinity), 'Infinity is not callable');
+		st.end();
+	});
+
+	t.test('strings', function (st) {
+		st.notOk(isCallable('foo'), 'string primitive is not callable');
+		st.notOk(isCallable(Object('foo')), 'string object is not callable');
+		st.end();
+	});
+
+	t.test('non-function with function in its [[Prototype]] chain', function (st) {
+		var Foo = function Bar() {};
+		Foo.prototype = noop;
+		st.equal(true, isCallable(Foo), 'sanity check: Foo is callable');
+		st.equal(false, isCallable(new Foo()), 'instance of Foo is not callable');
+		st.end();
+	});
+
+	t.end();
+});
+
+test('@@toStringTag', { skip: !hasSymbols || !Symbol.toStringTag }, function (t) {
+	var fakeFunction = {
+		toString: function () { return String(return3); },
+		valueOf: return3
+	};
+	fakeFunction[Symbol.toStringTag] = 'Function';
+	t.equal(String(fakeFunction), String(return3));
+	t.equal(Number(fakeFunction), return3());
+	t.notOk(isCallable(fakeFunction), 'fake Function with @@toStringTag "Function" is not callable');
+	t.end();
+});
+
+var typedArrayNames = [
+	'Int8Array',
+	'Uint8Array',
+	'Uint8ClampedArray',
+	'Int16Array',
+	'Uint16Array',
+	'Int32Array',
+	'Uint32Array',
+	'Float32Array',
+	'Float64Array'
+];
+
+test('Functions', function (t) {
+	t.ok(isCallable(noop), 'function is callable');
+	t.ok(isCallable(classFake), 'function with name containing "class" is callable');
+	t.ok(isCallable(returnClass), 'function with string " class " is callable');
+	t.ok(isCallable(isCallable), 'isCallable is callable');
+	t.end();
+});
+
+test('Typed Arrays', function (st) {
+	forEach(typedArrayNames, function (typedArray) {
+		/* istanbul ignore if : covered in node 0.6 */
+		if (typeof global[typedArray] === 'undefined') {
+			st.comment('# SKIP typed array "' + typedArray + '" not supported');
+		} else {
+			st.ok(isCallable(global[typedArray]), typedArray + ' is callable');
+		}
+	});
+	st.end();
+});
+
+test('Generators', { skip: generators.length === 0 }, function (t) {
+	forEach(generators, function (genFn) {
+		t.ok(isCallable(genFn), 'generator function ' + genFn + ' is callable');
+	});
+	t.end();
+});
+
+test('Arrow functions', { skip: arrows.length === 0 }, function (t) {
+	forEach(arrows, function (arrowFn) {
+		t.ok(isCallable(arrowFn), 'arrow function ' + arrowFn + ' is callable');
+	});
+	t.ok(isCallable(weirdlyCommentedArrowFn), 'weirdly commented arrow functions are callable');
+	t.end();
+});
+
+test('"Class" constructors', { skip: !classConstructor || !commentedClass || !commentedClassOneLine || !classAnonymous }, function (t) {
+	t.notOk(isCallable(classConstructor), 'class constructors are not callable');
+	t.notOk(isCallable(commentedClass), 'class constructors with comments in the signature are not callable');
+	t.notOk(isCallable(commentedClassOneLine), 'one-line class constructors with comments in the signature are not callable');
+	t.notOk(isCallable(classAnonymous), 'anonymous class constructors are not callable');
+	t.notOk(isCallable(classAnonymousCommentedOneLine), 'anonymous one-line class constructors with comments in the signature are not callable');
+	t.end();
+});
+
+test('`async function`s', { skip: asyncs.length === 0 }, function (t) {
+	forEach(asyncs, function (asyncFn) {
+		t.ok(isCallable(asyncFn), '`async function` ' + asyncFn + ' is callable');
+	});
+	t.end();
+});
+
+test('proxies of functions', { skip: !proxy }, function (t) {
+	t.ok(isCallable(proxy), 'proxies of functions are callable');
+	t.end();
+});
+
+test('throwing functions', function (t) {
+	t.plan(1);
+
+	var thrower = function (a) { return a.b; };
+	t.ok(isCallable(thrower), 'a function that throws is callable');
+});
+
+/* globals document: false */
+test('document.all', { skip: typeof document !== 'object' }, function (t) {
+	t.notOk(isCallable(document), 'document is not callable');
+	t.ok(isCallable(document.all), 'document.all is callable');
+
+	t.end();
+});