Bump karma from 5.0.3 to 5.0.4 (#1839)

Bumps [karma](https://github.com/karma-runner/karma) from 5.0.3 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](karma-runner/karma@v5.0.3...v5.0.4)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

package.json

@@ -51,7 +51,7 @@
     "handlebars": "4.7.6",
     "istanbul": "0.4.5",
     "jsep": "0.3.4",
-    "karma": "5.0.3",
+    "karma": "5.0.4",
     "karma-browserstack-launcher": "1.5.1",
     "karma-firefox-launcher": "1.3.0",
     "karma-mocha": "2.0.1",