🔧: Depend on typing_extensions only on Python <3.8

[hukkin]

No description provided.

[codecov]

Codecov Report

Base: 89.86% // Head: 89.83% // Decreases project coverage by -0.02% ⚠️

Coverage data is based on head (fdb7eba) compared to base (28725fc).
Patch coverage: 83.33% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #642      +/-   ##
==========================================
- Coverage   89.86%   89.83%   -0.03%     
==========================================
  Files          21       21              
  Lines        2150     2154       +4     
==========================================
+ Hits         1932     1935       +3     
- Misses        218      219       +1     

Flag	Coverage Δ
pytests	89.83% <83.33%> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
myst_parser/_compat.py	87.50% <75.00%> (-12.50%)	⬇️
myst_parser/config/dc_validators.py	85.45% <100.00%> (ø)
myst_parser/parsers/docutils_.py	81.08% <100.00%> (ø)

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[chrisjsewell]

cheers