[Snyk] Security upgrade express from 4.19.2 to 4.20.0

[satr]

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

Snyk changed the following file(s):

• api/package.json
• api/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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• Check the changes in this PR to ensure they won't cause issues with your project.
• Max score is 1000. Note that the real score may have changed since the PR was raised.
• This PR was automatically created by Snyk using the credentials of a real user.

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