add method unapply

[zydmayday]

can not run github action properly because of python not found issue.
see: actions/setup-python#544

need to rollback to ubuntu-20.04 instead of the latest.

[codecov-commenter]

Codecov Report

Base: 98.34% // Head: 98.34% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (7461ef3) compared to base (4c7ae4f).
Patch coverage: 77.77% of modified lines in pull request are covered.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #180   +/-   ##
=======================================
  Coverage   98.34%   98.34%           
=======================================
  Files         218      219    +1     
  Lines        2172     2179    +7     
=======================================
+ Hits         2136     2143    +7     
  Misses         36       36           

Impacted Files	Coverage Δ
ramda/private/_createReduce.py	88.88% <0.00%> (ø)
ramda/private/_xwrap.py	75.00% <0.00%> (ø)
ramda/concat.py	85.71% <33.33%> (ø)
ramda/__init__.py	100.00% <100.00%> (ø)
ramda/compose.py	100.00% <100.00%> (ø)
ramda/map.py	100.00% <100.00%> (ø)
ramda/pipe.py	100.00% <100.00%> (ø)
ramda/private/_arity.py	100.00% <100.00%> (ø)
ramda/private/_assoc.py	100.00% <100.00%> (ø)
ramda/private/_stepCat.py	100.00% <100.00%> (ø)
... and 1 more

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