Avoid attributes named "self"

[jrversteegh]

I'm currently working with an api that uses json:api. This uses a "self" attribute a lot. python-attrs fails to create an init function for this because of a name collision on self. Although self is not a keyword in python, it's probably a good idea to not allow self as an attribute name. Alternatively, you could try to convince the folks developing python-attrs to allow for a self attribute by using a different name for the self parameter internally, like pydantic does.
This is a quick fix to just create a self_ attribute instead.

[dbanty]

Disallowing self is a great idea I think, it's certainly treated like a keyword by convention. Could you run black on the code so it passes CI? poetry run task check will run that along with all the other linters and unit tests.

[codecov]

Codecov Report

Merging #301 (63830cf) into main (93723dd) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main      #301   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           46        46           
  Lines         1348      1353    +5     
=========================================
+ Hits          1348      1353    +5     

Impacted Files	Coverage Δ
openapi_python_client/utils.py	100.00% <100.00%> (ø)

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[dbanty]

Awesome, thanks! I plan on including this in the 0.8.0 release which should include your other open PR.