Adding socket methods used by trio

[mindflayer]

I am not 100% sure about the actual implementation.
This said, it definitely fixes #299.

[codecov]

Codecov Report

Attention: Patch coverage is 96.96970% with 1 line in your changes missing coverage. Please review.

Project coverage is 98.76%. Comparing base (e5b2275) to head (a0be340).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
mocket/socket.py	96.87%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #300      +/-   ##
==========================================
+ Coverage   98.72%   98.76%   +0.03%     
==========================================
  Files          22       22              
  Lines        1020     1052      +32     
==========================================
+ Hits         1007     1039      +32     
  Misses         13       13              

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[sonarqubecloud]

Quality Gate passed

Issues
7 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud