chore: Target flutter 2.10.3

[robinlinden]

This change is 

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[codecov[bot]]

Codecov Report

Merging #28 (8f4b4ad) into master (bd2b935) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #28   +/-   ##
=======================================
  Coverage   41.17%   41.17%           
=======================================
  Files           7        7           
  Lines         221      221           
=======================================
  Hits           91       91           
  Misses        130      130           

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