feat: bump twilio from 4.20.1 to 4.21.0

Bumps [twilio](https://github.com/twilio/twilio-node) from 4.20.1 to 4.21.0.
- [Release notes](https://github.com/twilio/twilio-node/releases)
- [Changelog](https://github.com/twilio/twilio-node/blob/main/CHANGES.md)
- [Commits](twilio/twilio-node@4.20.1...4.21.0)

---
updated-dependencies:
- dependency-name: twilio
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -34,7 +34,7 @@
   },
   "license": "MIT",
   "dependencies": {
-    "twilio": "^4.9.0"
+    "twilio": "^4.21.0"
   },
   "devDependencies": {
     "@tsconfig/recommended": "^1.0.2",