fix: upgrade express from 4.17.2 to 4.17.3

Snyk has created this PR to upgrade express from 4.17.2 to 4.17.3. See this package in npm: https://www.npmjs.com/package/express See this project in Snyk: https://app.snyk.io/org/loft-fzm/project/23c5a09c-7d53-41ef-b7ab-e6a1ec5c4ac6?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

examples/buildkit/package-lock.json

@@ -7,7 +7,7 @@
  "start": "nodemon index.js"
  },
  "dependencies": {
- "express": "^4.17.2",
+ "express": "^4.17.3",
  "nodemon": "^2.0.15"
  },
  "keywords": [