Update to reveal.js 4.6.1

Change-Id: I566737c50b93dd8c094ad3c3fa59865260b3b4ba
diff --git a/inst/reveal.js-4.6.1/test/test-dependencies.html b/inst/reveal.js-4.6.1/test/test-dependencies.html
new file mode 100644
index 0000000..cf3cf0e
--- /dev/null
+++ b/inst/reveal.js-4.6.1/test/test-dependencies.html
@@ -0,0 +1,55 @@
+<!doctype html>
+<html lang="en">
+
+	<head>
+		<meta charset="utf-8">
+
+		<title>reveal.js - Test Dependencies</title>
+
+		<link rel="stylesheet" href="../dist/reveal.css">
+		<link rel="stylesheet" href="../node_modules/qunit/qunit/qunit.css">
+		<script src="../node_modules/qunit/qunit/qunit.js"></script>
+	</head>
+
+	<body style="overflow: auto;">
+
+		<div id="qunit"></div>
+		<div id="qunit-fixture"></div>
+
+		<div class="reveal" style="display: none;">
+
+			<div class="slides">
+
+				<section>Slide content</section>
+
+			</div>
+
+		</div>
+
+		<script src="../dist/reveal.js"></script>
+		<script>
+			window.externalScriptSequence = '';
+
+			QUnit.config.testTimeout = 30000;
+			QUnit.config.autostart = false;
+			QUnit.module( 'Dependencies' );
+
+			Reveal.initialize({
+				dependencies: [
+					{ src: 'assets/external-script-a.js' },
+					{ src: 'assets/external-script-b.js' },
+					{ src: 'assets/external-script-c.js' }
+				]
+			}).then( () => {
+
+				QUnit.start();
+
+				QUnit.test( 'Load synchronous scripts', function( assert ) {
+					assert.strictEqual( window.externalScriptSequence, 'ABC', 'Loaded and executed in order' );
+				});
+
+			} );
+		</script>
+
+	</body>
+</html>