Bump vinyl-fs from 3.0.3 to 4.0.0 (fix #200)

Bumps [vinyl-fs](https://github.com/gulpjs/vinyl-fs) from 3.0.3 to 4.0.0.
- [Release notes](https://github.com/gulpjs/vinyl-fs/releases)
- [Changelog](https://github.com/gulpjs/vinyl-fs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/gulpjs/vinyl-fs/compare/v3.0.3...v4.0.0)

---
updated-dependencies:
- dependency-name: vinyl-fs
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Change-Id: Ice207567ead97a5fdd0f71846590e9e4c6128fbe
Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/package.json b/package.json
index d191177..a15edd7 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
     "imagemin": "^8.0.1",
     "optipng-bin": "^9.0.0",
     "sass": "^1.44.0",
-    "vinyl-fs": "^3.0.3"
+    "vinyl-fs": "^4.0.0"
   },
   "optionalDependencies": {
     "fsevents": "*"