⬆️ Bump mocha from 5.2.0 to 9.0.0

Bumps [mocha](https://github.com/mochajs/mocha) from 5.2.0 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@v5.2.0...v9.0.0)

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

package.json

@@ -46,7 +46,7 @@
     "eslint-plugin-standard": "^4.0.0",
     "graphql": "^14.0.2",
     "graphql-tools": "^4.0.3",
-    "mocha": "^5.2.0",
+    "mocha": "^9.0.0",
     "nyc": "^13.1.0"
   },
   "engines": {