Increment version to 6.7.1.dev0

[bdraco]

No description provided.

[codspeed-hq]

CodSpeed Performance Report

Merging #1253 will not alter performance

_{Comparing bdraco:671dev0 (3b1a4c8) with master (e2a8d08)}

Summary

✅ 245 untouched

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.85%. Comparing base (e2a8d08) to head (3b1a4c8).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1253   +/-   ##
=======================================
  Coverage   99.85%   99.85%           
=======================================
  Files          26       26           
  Lines        3507     3507           
  Branches      252      252           
=======================================
  Hits         3502     3502           
  Misses          3        3           
  Partials        2        2           

Flag	Coverage Δ
CI-GHA	99.85% <100.00%> (ø)
pytest	99.85% <100.00%> (ø)

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