Pin xpublish max version and allow local versions for setuptools_scm

[abkfenris]

Works on #10

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (01cc866) 90.90% compared to head (7f81fe8) 90.90%.

❗ Current head 7f81fe8 differs from pull request most recent head 5bd85db. Consider uploading reports for the commit 5bd85db to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #12   +/-   ##
=======================================
  Coverage   90.90%   90.90%           
=======================================
  Files           3        3           
  Lines          88       88           
=======================================
  Hits           80       80           
  Misses          8        8           

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