Bump NUnit from 4.1.0 to 4.2.0 in /src

[dependabot[bot]]

Bumps NUnit from 4.1.0 to 4.2.0.

Release notes

Sourced from NUnit's releases.

NUnit 4.2.0

See release notes

Commits

• 3f1eb04 Prepare for Release 4.2. (#4792)
• 7224040 Optimize message formatting (#4788)
• e59e1bf Merge pull request #4709 from maettu-this/4686_ProgressTraceListener
• 972aa33 Remove now unnecessary using statement.
• e92ba3f HostProtection attribute removed (review request by @​stevenaw)
• 51cd8b7 Clarifying the use of the listener (review finding @​manfred-brands)
• 4a7d539 Merge branch 'nunit:main' into 4686_ProgressTraceListener
• 2e436d7 Merge pull request #4779 from stevenaw/4778-dependency-refresh
• fd76945 Moved Windows specific SynchronizationContextTests to separate Windows projec...
• 96b7170 Merge pull request #4783 from nunit/issue4782_ValueSource
• Additional commits viewable in compare view

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[particularbot]

@dependabot merge

[dependabot[bot]]

One of your CI runs failed on this pull request, so Dependabot won't merge it.

Dependabot will still automatically merge this pull request if you amend it and your tests pass.

[dependabot[bot]]

Superseded by #7149.