chore(deps): update dependency @types/mocha to v9 (#1439)

Author: renovate-bot

package.json

@@ -59,7 +59,7 @@
     "@types/is": "0.0.21",
     "@types/knex": "^0.15.1",
     "@types/methods": "^1.1.0",
-    "@types/mocha": "^8.0.0",
+    "@types/mocha": "^9.0.0",
     "@types/node": "^14.0.0",
     "@types/node-fetch": "^2.5.0",
     "@types/once": "^1.4.0",