fix: packages/twilio-run/package.json to reduce vulnerabilities (#481)

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-SEMVER-3247795

Co-authored-by: snyk-bot <snyk-bot@snyk.io>

Author: twilio-product-security

packages/twilio-run/package.json

@@ -47,7 +47,7 @@
     "chokidar": "^3.2.3",
     "columnify": "^1.5.4",
     "common-tags": "^1.8.0",
-    "conf": "^5.0.0",
+    "conf": "^10.0.0",
     "cosmiconfig": "^8.0.0",
     "debug": "^3.1.0",
     "dotenv": "^6.2.0",