Fix lints & other updates

[ueman]

No description provided.

[codecov]

Codecov Report

Attention: 17 lines in your changes are missing coverage. Please review.

Comparison is base (1fa9054) 85.87% compared to head (034fbe6) 83.70%.
Report is 8 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #246      +/-   ##
==========================================
- Coverage   85.87%   83.70%   -2.18%     
==========================================
  Files          20       20              
  Lines         616      632      +16     
==========================================
  Hits          529      529              
- Misses         87      103      +16     

Files	Coverage Δ
feedback/lib/src/better_feedback.dart	97.91% <100.00%> (+0.13%)	⬆️
feedback/lib/src/controls_column.dart	100.00% <100.00%> (ø)
feedback/lib/src/feedback_bottom_sheet.dart	81.66% <100.00%> (-0.31%)	⬇️
...back/lib/src/feedback_builder/string_feedback.dart	100.00% <ø> (ø)
feedback/lib/src/feedback_controller.dart	100.00% <ø> (ø)
feedback/lib/src/feedback_data.dart	100.00% <ø> (ø)
feedback/lib/src/l18n/localization.dart	90.90% <100.00%> (-1.40%)	⬇️
feedback/lib/src/paint_on_background.dart	100.00% <ø> (ø)
feedback/lib/src/painter.dart	65.47% <ø> (-0.41%)	⬇️
feedback/lib/src/scale_and_clip.dart	100.00% <ø> (ø)
... and 6 more

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