pass: improve error-handling in tests, and don't fail early

[thaJeztah]

• extracting this from rewrite tests to use sub-tests, improve error-handling in tests, and use t.Cleanup() #275, because it looks like we're missing pass on macOS and Windows, and as a results, tests were not actually doing anything

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: -12.03 ⚠️

Comparison is base (4ede49c) 55.55% compared to head (bc53080) 43.52%.

Additional details and impacted files

@@             Coverage Diff             @@
##           master     #277       +/-   ##
===========================================
- Coverage   55.55%   43.52%   -12.03%     
===========================================
  Files           9        7        -2     
  Lines         666      448      -218     
===========================================
- Hits          370      195      -175     
+ Misses        253      222       -31     
+ Partials       43       31       -12     

see 3 files with indirect coverage changes

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[thaJeztah]

For macOS there's a brew formula; https://www.passwordstore.org/#macintosh that we could possibly use

[thaJeztah]

superseded by #289