Bump mocha from 6.2.2 to 9.0.3

Bumps [mocha](https://github.com/mochajs/mocha) from 6.2.2 to 9.0.3.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](mochajs/mocha@v6.2.2...v9.0.3)

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

Author: dependabot-preview[bot]

Diff for: package.json

@@ -32,7 +32,7 @@
   "devDependencies": {
     "chai": "^4.3.4",
     "eslint-plugin-chai-expect": "^2.0.1",
-    "mocha": "^6.2.2",
+    "mocha": "^9.0.3",
     "mocha-eslint": "^5.0.0"
   }
 }