Treat EWOULDBLOCK as timeout

[petrutlucian94]

py-amqp 2.4.0 caused a regression on Windows. Reading from a
non-blocking socket having the timeout set to 0 might raise a
WSAEWOULDBLOCK socket error instead of a timeout, which we're not
properly handling.

This change will make sure that we're just handling this as a
timeout, which will fix #252.

[codecov]

Codecov Report

Merging #253 into master will decrease coverage by 0.16%.
The diff coverage is 25%.

@@            Coverage Diff             @@
##           master     #253      +/-   ##
==========================================
- Coverage   95.93%   95.77%   -0.17%     
==========================================
  Files          14       14              
  Lines        1748     1752       +4     
  Branches      256      258       +2     
==========================================
+ Hits         1677     1678       +1     
- Misses         44       47       +3     
  Partials       27       27

Impacted Files	Coverage Δ
amqp/transport.py	87.5% <25%> (-0.89%)	⬇️

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[codecov]

Codecov Report

Merging #253 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #253      +/-   ##
==========================================
+ Coverage   95.93%   95.94%   +<.01%     
==========================================
  Files          14       14              
  Lines        1748     1752       +4     
  Branches      256      258       +2     
==========================================
+ Hits         1677     1681       +4     
  Misses         44       44              
  Partials       27       27

Impacted Files	Coverage Δ
amqp/transport.py	88.54% <100%> (+0.16%)	⬆️

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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[auvipy]

please fix the lint errors

[petrutlucian94]

please fix the lint errors

Whops, sorry about that. Updated the commit.

[auvipy]

thanks for fixing!! could you increase the test coverage a bit more?

[maingoh]

Tested and working ! Thanks a lot :)