Bump karma from 2.0.2 to 2.0.3 in /js

Bumps [karma](https://github.com/karma-runner/karma) from 2.0.2 to 2.0.3.
- [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/v2.0.2...v2.0.3)

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

js/package.json

@@ -27,7 +27,7 @@
     "webpack": "^4.12.0",
     "webpack-cli": "^3.0.3",
     "webpack-merge": "^4.1.2",
-    "karma": "^2.0.2"
+    "karma": "^2.0.3"
   },
   "scripts": {
     "build": "./node_modules/webpack-cli/bin/cli.js --mode production --config webpack.prod.config.js",