built-in python scalar types are supported: int, float, str, bool

[cosmicBboy]

fixes #221: This PR adds support for python built-in types that are natively interpretted by the pandas API: str, int, float, bool. This enables users to easily specify a schema using these commonly-used types without having to know anything about numpy types, pandas types, or the pandera.PandasDtype enum.

[codecov-commenter]

Codecov Report

Merging #263 into master will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #263      +/-   ##
==========================================
+ Coverage   96.58%   96.62%   +0.03%     
==========================================
  Files          15       15              
  Lines        1317     1332      +15     
==========================================
+ Hits         1272     1287      +15     
  Misses         45       45              

Impacted Files	Coverage Δ
pandera/dtypes.py	94.73% <100.00%> (+0.61%)	⬆️
pandera/schema_components.py	98.41% <100.00%> (ø)
pandera/schemas.py	96.58% <100.00%> (+0.06%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 02d385e...3c85cd1. Read the comment docs.