Update version and changelog for upcoming v0.3.0 release.

[tdenewiler]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 23.39%. Comparing base (6cf7193) to head (95c9d32).
Report is 1 commits behind head on main.

❗ There is a different number of reports uploaded between BASE (6cf7193) and HEAD (95c9d32). Click for more details.

HEAD has 7 uploads less than BASE

Flag	BASE (6cf7193)	HEAD (95c9d32)
	8	1

Additional details and impacted files

@@             Coverage Diff             @@
##             main      #66       +/-   ##
===========================================
- Coverage   98.83%   23.39%   -75.44%     
===========================================
  Files           7        7               
  Lines         342      342               
===========================================
- Hits          338       80      -258     
- Misses          4      262      +258     

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