Remove support for py2, py34, py35

[elacuesta]

No description provided.

[codecov]

Codecov Report

Merging #116 (c0451f7) into master (053f266) will increase coverage by 0.82%.
The diff coverage is 94.52%.

@@            Coverage Diff             @@
##           master     #116      +/-   ##
==========================================
+ Coverage   94.45%   95.28%   +0.82%     
==========================================
  Files           2        3       +1     
  Lines         703      763      +60     
  Branches      115      130      +15     
==========================================
+ Hits          664      727      +63     
+ Misses         23       20       -3     
  Partials       16       16              

Impacted Files	Coverage Δ
cssselect/xpath.py	94.96% <88.23%> (+2.01%)	⬆️
cssselect/parser.py	95.43% <96.36%> (-0.13%)	⬇️
cssselect/__init__.py	100.00% <100.00%> (ø)

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