v30 - using NamedTuple for ContentType & MultipartParameter

[commonism]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 95.55556% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 94.15%. Comparing base (8244236) to head (9b7cf9b).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/aiopenapi3/v30/formdata.py	97.14%	1 Missing ⚠️
src/aiopenapi3/v30/glue.py	88.88%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #411   +/-   ##
=======================================
  Coverage   94.14%   94.15%           
=======================================
  Files          88       88           
  Lines        7479     7490   +11     
=======================================
+ Hits         7041     7052   +11     
  Misses        438      438           

Flag	Coverage Δ
core	94.15% <95.55%> (+<0.01%)	⬆️
extras	94.15% <95.55%> (+<0.01%)	⬆️

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