Update typing-extensions, plus a fixes for other breaking changes.

[seandstewart]

• Update the Keyword enum repr for breaking change in Py3.10
• Update introspection for type hints including return value
• Add py3.11 to test matrix

resolves #198

[codecov[bot]]

Codecov Report

Merging #203 (a49457c) into main (05babfb) will increase coverage by 0.02%. The diff coverage is 100.00%.

:exclamation: Current head a49457c differs from pull request most recent head 6534b16. Consider uploading reports for the commit 6534b16 to get more accurate results

@@            Coverage Diff             @@
##             main     #203      +/-   ##
==========================================
+ Coverage   94.72%   94.74%   +0.02%     
==========================================
  Files          37       37              
  Lines        4358     4376      +18     
  Branches      769      886     +117     
==========================================
+ Hits         4128     4146      +18     
  Misses        142      142              
  Partials       88       88              

Flag	Coverage Δ
unittests	94.60% <100.00%> (+0.02%)	:arrow_up:

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Impacted Files	Coverage Δ
typic/__init__.py	100.00% <100.00%> (ø)
typic/compat.py	100.00% <100.00%> (ø)
typic/gen.py	86.80% <100.00%> (+0.18%)	:arrow_up:
typic/serde/resolver.py	92.66% <100.00%> (+0.04%)	:arrow_up: