handle EALREADY / WSAEALREADY

[swhitty]

resolves #190

When a socket is connecting and EALREADY / WSAEALREADY errorNo is returned, treat it like the socket is blocked and wait for the socket to become ready.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.45%. Comparing base (da149f5) to head (9a1f9b3).
⚠️ Report is 5 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #198      +/-   ##
==========================================
+ Coverage   92.40%   92.45%   +0.05%     
==========================================
  Files          69       69              
  Lines        3540     3551      +11     
==========================================
+ Hits         3271     3283      +12     
+ Misses        269      268       -1     

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