Release 0.3

[ericpre]

https://github.com/hyperspy/exspy/blob/main/releasing_guide.md

Release workflow tested at https://github.com/ericpre/exspy/actions/runs/11278438944

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.82%. Comparing base (58cf3cd) to head (2e16e41).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff            @@
##             main      #89    +/-   ##
========================================
  Coverage   88.82%   88.82%            
========================================
  Files          77       77            
  Lines        7475     7475            
  Branches     1205     1024   -181     
========================================
  Hits         6640     6640            
- Misses        567      568     +1     
+ Partials      268      267     -1     

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