Merge pull request #1827 from MelsHyrule/karma-6.4.1

Upgrading package karma to 6.4.1

Author: Fryguy

package.json

@@ -99,7 +99,7 @@
     "gettext-parser": "~4.0.4",
     "glob": "~7.1.6",
     "html-webpack-plugin": "~4.5.0",
-    "karma": "~6.3.20",
+    "karma": "~6.4.1",
     "karma-babel-preprocessor": "~8.0.1",
     "karma-chai": "~0.1.0",
     "karma-chai-sinon": "~0.1.5",