Bump karma from 6.3.17 to 6.3.19 (#4195)

* Bump karma from 6.3.17 to 6.3.19

Bumps [karma](https://github.com/karma-runner/karma) from 6.3.17 to 6.3.19.
- [Release notes](https://github.com/karma-runner/karma/releases)
- [Changelog](https://github.com/karma-runner/karma/blob/master/CHANGELOG.md)
- [Commits](karma-runner/karma@v6.3.17...v6.3.19)

---
updated-dependencies:
- dependency-name: karma
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package.json

@@ -103,7 +103,7 @@
     "json5-loader": "4.0.1",
     "jsonlint": "1.6.3",
     "jspdf": "2.5.1",
-    "karma": "6.3.17",
+    "karma": "6.3.19",
     "karma-chai": "0.1.0",
     "karma-chrome-launcher": "3.1.1",
     "karma-coverage": "2.2.0",