[Snyk] Security upgrade express from 4.17.1 to 4.21.0#16

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twilio-product-security wants to merge 1 commit intomainfrom snyk-fix-2e4ef38cbb120094a005234e25139f80

+275-178

Commits on Sep 12, 2024

fix: media-streams/package.json & media-streams/package-lock.json to reduce vulnerabilities
snyk-bot
committed