Bump @google-cloud/functions-framework from 1.9.0 to 3.0.0

Bumps [@google-cloud/functions-framework](https://github.com/GoogleCloudPlatform/functions-framework-nodejs) from 1.9.0 to 3.0.0.
- [Release notes](https://github.com/GoogleCloudPlatform/functions-framework-nodejs/releases)
- [Changelog](https://github.com/GoogleCloudPlatform/functions-framework-nodejs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/GoogleCloudPlatform/functions-framework-nodejs/compare/v1.9.0...v3.0.0)

---
updated-dependencies:
- dependency-name: "@google-cloud/functions-framework"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

packages/inbound-email-handler/package.json

@@ -26,7 +26,7 @@
     "eslint-plugin-prettier": "^4.0.0"
   },
   "dependencies": {
-    "@google-cloud/functions-framework": "1.9.0",
+    "@google-cloud/functions-framework": "3.0.0",
     "@google-cloud/pubsub": "^2.18.4",
     "@sendgrid/client": "^7.6.0",
     "@sentry/serverless": "^6.16.1",