Implement API call retry processing (refs #3)

[laughingman7743]

No description provided.

[codecov-io]

Codecov Report

Merging #8 into master will increase coverage by 0.41%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master      #8      +/-   ##
=========================================
+ Coverage   89.69%   90.1%   +0.41%     
=========================================
  Files           8       8              
  Lines         524     546      +22     
=========================================
+ Hits          470     492      +22     
  Misses         54      54

Impacted Files	Coverage Δ
pyathena/__init__.py	82.14% <ø> (ø)	⬆️
pyathena/cursor.py	87.76% <100%> (+0.48%)	⬆️
pyathena/util.py	86.36% <100%> (+7.79%)	⬆️
pyathena/connection.py	91.48% <100%> (+1.01%)	⬆️

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