[Snyk] Security upgrade express from 4.19.2 to 4.21.0

[therealbenpai]

Snyk has created this PR to fix 4 vulnerabilities in the npm dependencies of this project.

Snyk changed the following file(s):

• package.json
• package-lock.json

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Asymmetric Resource Consumption (Amplification) SNYK-JS-BODYPARSER-7926860	112
	Cross-site Scripting SNYK-JS-EXPRESS-7926867	107
	Cross-site Scripting SNYK-JS-SEND-7926862	80
	Cross-site Scripting SNYK-JS-SERVESTATIC-7926865	80

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[deepsource-io]

Here's the code health analysis summary for commits 533490b..65d0e9f. View details on DeepSource ↗.

Analysis Summary

Analyzer	Status	Summary	Link
JavaScript	✅ Success		View Check ↗

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