Adding semantic-version to workflow reqs

[PietropaoloFrisoni]

This PR should fix this test in the plugin-test-matrix. The latest PL version does not use semantic-version, but the stable version still does, so we add such a package to the workflow requirements.

[github-actions]

Hello. You may have forgotten to update the changelog!
Please edit .github/CHANGELOG.md with:

• A one-to-two sentence description of the change. You may include a small working example for new features.
• A link back to this PR.
• Your name (or GitHub username) in the contributors section.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.30%. Comparing base (186a1b1) to head (b0cf9f8).
Report is 86 commits behind head on master.

❗ There is a different number of reports uploaded between BASE (186a1b1) and HEAD (b0cf9f8). Click for more details.

HEAD has 64 uploads less than BASE

Flag	BASE (186a1b1)	HEAD (b0cf9f8)
	69	5

Additional details and impacted files

@@             Coverage Diff             @@
##           master     #835       +/-   ##
===========================================
- Coverage   98.52%   59.30%   -39.22%     
===========================================
  Files         114       17       -97     
  Lines       18147     1902    -16245     
===========================================
- Hits        17879     1128    -16751     
- Misses        268      774      +506     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[AmintorDusko]

Thank you for the update!