Fix up sdist packaging for py.typed

[codecov[bot]]

Codecov Report

Merging #53 (d2d451e) into main (373877b) will not change coverage. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main      #53   +/-   ##
=======================================
  Coverage   99.95%   99.95%           
=======================================
  Files          30       30           
  Lines        4342     4342           
=======================================
  Hits         4340     4340           
  Misses          2        2           

Flag	Coverage Δ
	99.95% <100.00%> (ø)
py3.10	99.95% <100.00%> (ø)
py3.11	99.95% <100.00%> (ø)
py3.7	99.95% <100.00%> (ø)
py3.8	99.95% <100.00%> (ø)
py3.9	99.95% <100.00%> (ø)
x64	99.95% <100.00%> (ø)
x86	94.24% <100.00%> (ø)

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

Impacted Files	Coverage Δ
src/spnego/_version.py	100.00% <100.00%> (ø)

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.