build(deps-dev): bump @types/mongodb from 3.6.20 to 4.0.7

Bumps [@types/mongodb](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/mongodb) from 3.6.20 to 4.0.7.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/mongodb)

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

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

package.json

@@ -44,7 +44,7 @@
     "devDependencies": {
         "@types/express": "^4.17.13",
         "@types/google-cloud__storage": "^1.7.2",
-        "@types/mongodb": "^3.6.20",
+        "@types/mongodb": "^4.0.7",
         "@types/mongoose": "^5.11.97",
         "@types/multer": "^1.4.7",
         "apidoc": "^0.28.1",