Skip already packed workflows

[mr-c]

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[codecov-commenter]

Codecov Report

Merging #25 (bdb6f61) into master (9f54a6a) will increase coverage by 0.11%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #25      +/-   ##
==========================================
+ Coverage   97.54%   97.65%   +0.11%     
==========================================
  Files           5        5              
  Lines         122      128       +6     
==========================================
+ Hits          119      125       +6     
  Misses          3        3              

Impacted Files	Coverage Δ
tests/test_packing.py	100.00% <100.00%> (ø)

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