web animation updates

scripts/vendor/web-animations-js/test/karma-config.js

@@ -0,0 +1,22 @@
+module.exports = function(config) {
+  config.set({
+    frameworks: ['mocha', 'chai'],
+    plugins: [
+      'karma-mocha',
+      'karma-chai',
+      'karma-chrome-launcher',
+      'karma-firefox-launcher'
+    ],
+    browsers: ['Firefox'],
+    // browsers: ['Safari', 'Chrome', 'ChromeCanary', 'Firefox', 'IE'],
+    basePath: '..',
+    files: [
+      // Populated in `grunt test` task.
+    ],
+    singleRun: true,
+    port: 9876,
+    reporters: ['dots'],
+    colors: true,
+    autoWatch: false,
+  });
+};