Don't run the @testset if there are no tests

[kuszmaul]

Some testing tools complain if a @testset is empty. So don't run empty test sets.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 8 lines in your changes missing coverage. Please review.

Project coverage is 74.77%. Comparing base (1fca5d9) to head (fdba062).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
src/Aqua.jl	50.00%	8 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #319      +/-   ##
==========================================
- Coverage   74.90%   74.77%   -0.14%     
==========================================
  Files          11       11              
  Lines         761      761              
==========================================
- Hits          570      569       -1     
- Misses        191      192       +1     

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[nickrobinson251]

LGTM

But ideally a maintainer of this package should review / merge

[lgoettgens]

It indeed made little sense to print the empty testsets for testsets that were intentionally skipped. Thanks