Fix Typescript failures and introduce step in GitHub action

[jorrit]

What does it do?

The PR fixes all issues found by tsc --noEmit and adds a step to the lint workflow.

Why is it needed?

Describe the issue you are solving.

How to test it?

Provide information about the environment and the path to verify the behaviour.

Related issue(s)/PR(s)

Let us know if this is related to any issue/pull request

[changeset-bot]

🦋 Changeset detected

Latest commit: b917017

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
strapi-plugin-webtools	Patch

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 43.10%. Comparing base (8ad7fbe) to head (b917017).
Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #287      +/-   ##
==========================================
- Coverage   43.24%   43.10%   -0.14%     
==========================================
  Files           2        2              
  Lines         629      638       +9     
  Branches      156      157       +1     
==========================================
+ Hits          272      275       +3     
- Misses        285      291       +6     
  Partials       72       72              

Flag	Coverage Δ
unit	43.10% <ø> (-0.14%)	⬇️

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[boazpoolman]

Awesome, thanks Jorrit!