fix: upgrade express from 4.12.4 to 4.21.0

Snyk has created this PR to upgrade express from 4.12.4 to 4.21.0.

See this package in npm:
https://www.npmjs.com/package/express

See this project in Snyk:
https://app.snyk.io/org/kaosar-UWr9vkwrht8g88W5RHVHnH/project/bd5050db-9ba8-419f-a6a8-99c5f40bc80b?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot