Add function: aiofiles.os.access()

[rexzhang]

issue # 145

[rexzhang]

Please wait some time, I will add more unit test

[rexzhang]

finished

[Tinche]

Add a changelog fragment too please (create a new section for 22.2.0 if it's not there).

[codecov-commenter]

Codecov Report

Base: 89.86% // Head: 89.90% // Increases project coverage by +0.03% 🎉

Coverage data is based on head (849cb02) compared to base (8c7b922).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #146      +/-   ##
==========================================
+ Coverage   89.86%   89.90%   +0.03%     
==========================================
  Files          10       10              
  Lines         306      307       +1     
==========================================
+ Hits          275      276       +1     
  Misses         31       31              

Impacted Files	Coverage Δ
src/aiofiles/os.py	100.00% <100.00%> (ø)

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[rexzhang]

Add a changelog fragment too please (create a new section for 22.2.0 if it's not there).

done

[Tinche]

Thanks! The failing test is a pip bug, so I'm going to merge this in.