Switch from setup.py to declarative setup.cfg

[asvetlov]

No description provided.

[codecov]

Codecov Report

Merging #375 (00e8cac) into master (7f1a669) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #375   +/-   ##
=======================================
  Coverage   95.45%   95.45%           
=======================================
  Files           4        4           
  Lines        1277     1277           
  Branches      124      124           
=======================================
  Hits         1219     1219           
  Misses         50       50           
  Partials        8        8           

Flag	Coverage Δ
unit	95.30% <ø> (ø)

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