Bump @types/mocha from 8.2.3 to 9.0.0

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] <support@github.com>

package.json

@@ -63,7 +63,7 @@
   "homepage": "https://github.com/dolanmiu/docx#readme",
   "devDependencies": {
     "@types/chai": "^4.2.15",
-    "@types/mocha": "^8.0.0",
+    "@types/mocha": "^9.0.0",
     "@types/request-promise": "^4.1.42",
     "@types/sinon": "^10.0.0",
     "@types/webpack": "^5.0.0",