Update setup.py

[Seleznev-nvkz]

aiohttp>=3.0.1 require python>=3.5.3 and can't be installed on version 3.5.2 or lower. https://github.com/aio-libs/aiohttp#requirements

[coveralls]

Coverage remained the same at 95.323% when pulling 44b37e7599be1cffb6eb606dc6fe4874f093ffc6 on Seleznev-nvkz:patch-1 into 28a74b2449c4baed9629efbe413fda0ad6e2db2d on youknowone:master.

[codecov[bot]]

Codecov Report

Merging #54 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #54   +/-   ##
=======================================
  Coverage   95.32%   95.32%           
=======================================
  Files          10       10           
  Lines         449      449           
=======================================
  Hits          428      428           
  Misses         21       21

[youknowone]

Thanks!