Bump flat and mocha

Bumps [flat](https://github.com/hughsk/flat) to 5.0.2 and updates ancestor dependency [mocha](https://github.com/mochajs/mocha). These dependencies need to be updated together.


Updates `flat` from 4.1.1 to 5.0.2
- [Commits](hughsk/flat@4.1.1...5.0.2)

Updates `mocha` from 6.2.3 to 10.2.0
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](mochajs/mocha@v6.2.3...v10.2.0)

---
updated-dependencies:
- dependency-name: flat
  dependency-type: indirect
- dependency-name: mocha
  dependency-type: direct:development
...

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

Author: dependabot[bot]

package-lock.json

@@ -145,7 +145,7 @@
         "jasmine-core": "^2.5.2",
         "jshint": "~2.9.4",
         "jshint-stylish": "~1.0.0",
-        "mocha": "^6.2.0",
+        "mocha": "^10.2.0",
         "natives": "^1.1.6",
         "protractor": "^6.0.0",
         "require-dir": "~0.3.2",