Bump karma-browserify from 5.3.0 to 6.0.0

Bumps [karma-browserify](https://github.com/nikku/karma-browserify) from 5.3.0 to 6.0.0.
- [Release notes](https://github.com/nikku/karma-browserify/releases)
- [Commits](https://github.com/nikku/karma-browserify/compare/v5.3.0...v6.0.0)
Signed-off-by: dependabot[bot] <support@dependabot.com>

package.json

@@ -67,7 +67,7 @@
     "jquery": "^3.2.1",
     "js-polyfills": "^0.1.16",
     "karma": "^4.0.0",
-    "karma-browserify": "^5.0.5",
+    "karma-browserify": "^6.0.0",
     "karma-chai": "^0.1.0",
     "karma-coverage": "^1.1.1",
     "karma-mocha": "^1.1.1",

yarn.lock

@@ -5029,10 +5029,10 @@ just-extend@^4.0.2:
   resolved "https://registry.yarnpkg.com/just-extend/-/just-extend-4.0.2.tgz#f3f47f7dfca0f989c55410a7ebc8854b07108afc"
   integrity sha512-FrLwOgm+iXrPV+5zDU6Jqu4gCRXbWEQg2O3SKONsWE4w7AXFRkryS53bpWdaL9cNol+AmR3AEYz6kn+o0fCPnw==
 
-karma-browserify@^5.0.5:
-  version "5.3.0"
-  resolved "https://registry.yarnpkg.com/karma-browserify/-/karma-browserify-5.3.0.tgz#9001796dfd1196cbc0327b022a00c6345a28e5dd"
-  integrity sha512-EMaUd1RNyQVGTETI80dtX/fEtYs57/A5sl3rClvzJFImPW1s3EtsbESfqNtk7/OkzfYuAHLh4RSZSSbVgvhNdQ==
+karma-browserify@^6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/karma-browserify/-/karma-browserify-6.0.0.tgz#423b719fe80d064ad5ec36f8eb15c399305b9aba"
+  integrity sha512-G3dGjoy1/6P8I6qTp799fbcAxs4P+1JcyEKUzy9g1/xMakqf9FFPwW2T9iEtCbWoH5WIKD3z+YwGL5ysBhzrsg==
   dependencies:
     convert-source-map "^1.1.3"
     hat "^0.0.3"