Fixing: flake8 E402 and windows setup.py not working

[gavishpoddar]

This PR Fixes,

• Fixing E402 module-level import, not at top of file in dateparser/docs/conf.py
• Fixing UnicodeDecodeError: 'charmap' codec can't decode byte 0x8f in position 1442: character maps to in Windows

Note: This change makes it possible to run pip install . . But tox is not entirely fixed.

Please suggest.

[codecov[bot]]

Codecov Report

Merging #955 (e36d79b) into master (41f9478) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #955   +/-   ##
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  Coverage   98.29%   98.29%           
=======================================
  Files         234      234           
  Lines        2694     2694           
=======================================
  Hits         2648     2648           
  Misses         46       46           

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[gavishpoddar]

Hi, I have made the changes