chore(deps): update dependency @types/express to v4.17.21

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@types/express (source)	4.17.12 -> 4.17.21

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[codecov]

Codecov Report

Merging #314 (5030b8e) into develop (702fd65) will not change coverage.
Report is 4 commits behind head on develop.
The diff coverage is n/a.

❗ Current head 5030b8e differs from pull request most recent head 996cc61. Consider uploading reports for the commit 996cc61 to get more accurate results

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #314   +/-   ##
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  Coverage    80.40%   80.40%           
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  Files           28       28           
  Lines         1031     1031           
  Branches       168      168           
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  Hits           829      829           
  Misses         165      165           
  Partials        37       37