Feature/nunit api

[jas88]

Proposed Changes

Update NUnit for v4 API as preparation for NUnit version bump required for later RDMP 8.1.x.

Types of changes

What types of changes does your code introduce? Tick all that apply.

• Bugfix (non-breaking change which fixes an issue)
• New Feature (non-breaking change which adds functionality)
• Breaking Change (fix or feature that would cause existing functionality to not work as expected)
• Documentation-Only Update (if none of the other choices apply)
  • In this case, ensure that the message of the head commit from the source branch is prefixed with [skip ci]

Checklist

By opening this PR, I confirm that I have:

• Reviewed the contributing guidelines for this repository
• Ensured that the PR branch is in sync with the target branch (i.e. it is automatically merge-able)
• Updated any relevant API documentation
• Created or updated any tests if relevant
• Created a news file
  • NOTE: This must include any changes to any of the following files: default.yaml, any of the RabbitMQ server configurations, GlobalOptions.cs
• Listed myself in the CONTRIBUTORS file 🚀
• Requested a review by one of the repository maintainers

Issues

Closes #1734

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.79%. Comparing base (1189483) to head (314d5f6).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1834   +/-   ##
=======================================
  Coverage   59.79%   59.79%           
=======================================
  Files         177      177           
  Lines        6328     6328           
  Branches      870      870           
=======================================
  Hits         3784     3784           
  Misses       2303     2303           
  Partials      241      241           

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

[rkm]

Initial review only - not had a chance to check everything yet

[rkm]

Thanks for tackling this, @jas88 !