Bump karma from 5.0.2 to 5.0.4 in /js

Bumps [karma](https://github.com/karma-runner/karma) from 5.0.2 to 5.0.4.
- [Release notes](https://github.com/karma-runner/karma/releases)
- [Changelog](https://github.com/karma-runner/karma/blob/master/CHANGELOG.md)
- [Commits](https://github.com/karma-runner/karma/compare/v5.0.2...v5.0.4)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

js/package.json

@@ -32,7 +32,7 @@
     "@babel/preset-env": "^7.9.6",
     "babel-loader": "^8.1.0",
     "css-loader": "^3.5.3",
-    "karma": "^5.0.2",
+    "karma": "^5.0.4",
     "mini-css-extract-plugin": "^0.9.0",
     "style-loader": "^1.2.1",
     "url-loader": "^4.1.0",