feat: add simplify.

[Clarmy]

No description provided.

[codecov-commenter]

Codecov Report

Merging #75 (15db2d1) into 1.1 (0c9e689) will increase coverage by 54.25%.
The diff coverage is 99.12%.

@@             Coverage Diff             @@
##              1.1      #75       +/-   ##
===========================================
+ Coverage   35.81%   90.07%   +54.25%     
===========================================
  Files           9       10        +1     
  Lines         832      856       +24     
===========================================
+ Hits          298      771      +473     
+ Misses        534       85      -449     

Impacted Files	Coverage Δ
cnmaps/drawing.py	97.91% <91.66%> (+97.91%)	⬆️
cnmaps/__init__.py	93.75% <100.00%> (+93.75%)	⬆️
cnmaps/maps.py	96.49% <100.00%> (+96.49%)	⬆️
cnmaps/sample.py	100.00% <100.00%> (+100.00%)	⬆️
tests/test_drawing.py	100.00% <100.00%> (ø)
tests/test_geo.py	100.00% <100.00%> (ø)
tests/test_map.py	99.47% <100.00%> (+0.09%)	⬆️
cnmaps/geo.py	31.94% <0.00%> (+31.94%)	⬆️
... and 3 more

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[Clarmy]

用于解决 #74