Add initial support for poetry

[marcelotrevisani]

No description provided.

[codecov-commenter]

Codecov Report

Merging #433 (2d31689) into main (9c3242e) will increase coverage by 0.69%.
The diff coverage is 92.69%.

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@@            Coverage Diff             @@
##             main     #433      +/-   ##
==========================================
+ Coverage   91.30%   92.00%   +0.69%     
==========================================
  Files          17       18       +1     
  Lines        1576     2050     +474     
==========================================
+ Hits         1439     1886     +447     
- Misses        137      164      +27     

Flag	Coverage Δ
unittests	92.00% <92.69%> (+0.69%)	⬆️

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Impacted Files	Coverage Δ
setup.py	0.00% <0.00%> (ø)
grayskull/base/github.py	72.83% <72.83%> (ø)
grayskull/license/discovery.py	93.81% <72.97%> (-3.33%)	⬇️
grayskull/strategy/abstract_strategy.py	83.33% <83.33%> (ø)
grayskull/strategy/cran.py	90.20% <90.20%> (ø)
grayskull/base/factory.py	90.69% <92.30%> (+0.69%)	⬆️
grayskull/__main__.py	93.49% <92.94%> (-4.66%)	⬇️
grayskull/strategy/py_toml.py	95.00% <95.00%> (ø)
grayskull/strategy/py_base.py	95.42% <95.42%> (ø)
grayskull/strategy/pypi.py	97.69% <97.69%> (ø)
... and 10 more

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