Bump mocha from 8.4.0 to 9.0.1

Bumps [mocha](https://github.com/mochajs/mocha) from 8.4.0 to 9.0.1.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](mochajs/mocha@v8.4.0...v9.0.1)

---
updated-dependencies:
- dependency-name: mocha
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -60,7 +60,7 @@
         "html-validator": "^5.1.17",
         "htmlencode": "0.0.4",
         "lockfile-lint": "^4.6.2",
-        "mocha": "^8.4.0",
+        "mocha": "^9.0.1",
         "mockdate": "^3.0.5",
         "nodemon": "^2.0.7",
         "npm-run-all": "^4.1.5",