Add pentagonal prism

[MatthewFlamm]

Closes #50

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.07 🎉

Comparison is base (e385074) 99.11% compared to head (f34f0e9) 99.19%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #57      +/-   ##
==========================================
+ Coverage   99.11%   99.19%   +0.07%     
==========================================
  Files           4        4              
  Lines         226      247      +21     
==========================================
+ Hits          224      245      +21     
  Misses          2        2              

Impacted Files	Coverage Δ
src/pyransame/util.py	100.00% <100.00%> (ø)
src/pyransame/volume.py	97.56% <100.00%> (+0.12%)	⬆️

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