Bump karma from 6.3.14 to 6.3.16 in /tfjs-layers (#6185)

Bumps [karma](https://github.com/karma-runner/karma) from 6.3.14 to 6.3.16.
- [Release notes](https://github.com/karma-runner/karma/releases)
- [Changelog](https://github.com/karma-runner/karma/blob/master/CHANGELOG.md)
- [Commits](karma-runner/karma@v6.3.14...v6.3.16)

---
updated-dependencies:
- dependency-name: karma
  dependency-type: direct:development
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

tfjs-layers/yarn.lock

@@ -2519,9 +2519,9 @@ karma-typescript@~5.5.1:
     vm-browserify "^1.1.2"
 
 karma@~6.3.1:
-  version "6.3.14"
-  resolved "https://registry.yarnpkg.com/karma/-/karma-6.3.14.tgz#1ed57a489249b9260bc604325ae333766d4cddc9"
-  integrity sha512-SDFoU5F4LdosEiUVWUDRPCV/C1zQRNtIakx7rWkigf7R4sxGADlSEeOma4S1f/js7YAzvqLW92ByoiQptg+8oQ==
+  version "6.3.16"
+  resolved "https://registry.yarnpkg.com/karma/-/karma-6.3.16.tgz#76d1a705fd1cf864ee5ed85270b572641e0958ef"
+  integrity sha512-nEU50jLvDe5yvXqkEJRf8IuvddUkOY2x5Xc4WXHz6dxINgGDrgD2uqQWeVrJs4hbfNaotn+HQ1LZJ4yOXrL7xQ==
   dependencies:
     body-parser "^1.19.0"
     braces "^3.0.2"
@@ -2538,6 +2538,7 @@ karma@~6.3.1:
     log4js "^6.4.1"
     mime "^2.5.2"
     minimatch "^3.0.4"
+    mkdirp "^0.5.5"
     qjobs "^1.2.0"
     range-parser "^1.2.1"
     rimraf "^3.0.2"