fix: upgrade express from 4.18.1 to 4.21.1

Snyk has created this PR to upgrade express from 4.18.1 to 4.21.1.

See this package in npm:
express

See this project in Snyk:
https://app.snyk.io/org/sammytezzy/project/20d96395-553d-4f02-9cf2-7a7ac30390c2?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot