Bump @types/mocha from 8.2.3 to 9.0.0 (#941)

Bumps [@types/mocha](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/mocha) from 8.2.3 to 9.0.0.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/mocha)

---
updated-dependencies:
- dependency-name: "@types/mocha"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

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

package.json

@@ -51,7 +51,7 @@
     "@types/express": "^4.16.0",
     "@types/jsonwebtoken": "^8.3.9",
     "@types/lokijs": "^1.5.2",
-    "@types/mocha": "^8.2.2",
+    "@types/mocha": "^9.0.0",
     "@types/morgan": "^1.7.35",
     "@types/multistream": "^2.1.1",
     "@types/node": "^14.14.24",