Bump version to 0.3.0

[matagus]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.72%. Comparing base (dc88a4d) to head (e153cb0).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #12   +/-   ##
=======================================
  Coverage   78.72%   78.72%           
=======================================
  Files          12       12           
  Lines          94       94           
=======================================
  Hits           74       74           
  Misses         20       20           

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