Bump karma from 6.3.19 to 6.3.20

Bumps [karma](https://github.com/karma-runner/karma) from 6.3.19 to 6.3.20.
- [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/v6.3.19...v6.3.20)

---
updated-dependencies:
- dependency-name: karma
  dependency-type: direct:development
  update-type: version-update:semver-patch
...
Signed-off-by: dependabot[bot] <support@github.com>

yarn.lock

@@ -4830,9 +4830,9 @@ karma-source-map-support@^1.4.0:
     source-map-support "^0.5.5"
 
 karma@^6.0.1:
-  version "6.3.19"
-  resolved "https://registry.yarnpkg.com/karma/-/karma-6.3.19.tgz#e50759667b0b9c6ad758655db0547d3ab4d2abf5"
-  integrity sha512-NDhWckzES/Y9xMiddyU1RzaKL76/scCsu8Mp0vR0Z3lQRvC3p72+Ab4ppoxs36S9tyPNX5V48yvaV++RNEBPZw==
+  version "6.3.20"
+  resolved "https://registry.yarnpkg.com/karma/-/karma-6.3.20.tgz#12f5c3b0e68f204607cb0a3a78d4751b42ef61a8"
+  integrity sha512-HRNQhMuKOwKpjYlWiJP0DUrJOh+QjaI/DTaD8b9rEm4Il3tJ8MijutVZH4ts10LuUFst/CedwTS6vieCN8yTSw==
   dependencies:
     "@colors/colors" "1.5.0"
     body-parser "^1.19.0"