Bump mocha from 8.4.0 to 9.0.0 (#580)

Bumps [mocha](https://github.com/mochajs/mocha) from 8.4.0 to 9.0.0.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](mochajs/mocha@v8.4.0...v9.0.0)

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

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

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

package.json

@@ -85,7 +85,7 @@
     "jsii": "^1.30.0",
     "jsii-pacmak": "^1.30.0",
     "jsii-release": "^0.2.44",
-    "mocha": "^8.4.0",
+    "mocha": "^9.0.0",
     "nyc": "^15.1.0",
     "source-map-support": "^0.5.19",
     "ts-node": "^10.0.0",