Split tests with and without OnlyNeeded...

[stertooy]

...to avoid disk space problems on runners. This is a bit of a workaround for #35 and doesn't address the core issue, but at least the tests can be used now.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.98%. Comparing base (6bb916a) to head (2b1d21e).
⚠️ Report is 4 commits behind head on master.

Additional details and impacted files

@@              Coverage Diff              @@
##           master       #36        +/-   ##
=============================================
+ Coverage   35.30%    99.98%    +64.67%     
=============================================
  Files           3        90        +87     
  Lines         759   3394612   +3393853     
=============================================
+ Hits          268   3394128   +3393860     
+ Misses        491       484         -7     

see 90 files with indirect coverage changes

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