fix: add fixes for new widgets

[tlambert03]

pins widgets to >0.3.0 and gets tests passing again.

Note @fdrgsp ... I'm just skipping the sample explorer tests here. Please fix those when you get a chance

[codecov]

Codecov Report

Base: 84.35% // Head: 74.16% // Decreases project coverage by -10.19% ⚠️

Coverage data is based on head (b2580cf) compared to base (63a12e2).
Patch coverage: 59.25% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #246       +/-   ##
===========================================
- Coverage   84.35%   74.16%   -10.19%     
===========================================
  Files          16       16               
  Lines         901      871       -30     
===========================================
- Hits          760      646      -114     
- Misses        141      225       +84     

Impacted Files	Coverage Δ
src/napari_micromanager/__main__.py	100.00% <ø> (ø)
src/napari_micromanager/_saving.py	55.93% <ø> (-16.95%)	⬇️
src/napari_micromanager/_mda_handler.py	72.79% <52.17%> (-25.37%)	⬇️
...rc/napari_micromanager/_gui_objects/_mda_widget.py	88.67% <100.00%> (-2.40%)	⬇️
...cromanager/_gui_objects/_sample_explorer_widget.py	57.33% <100.00%> (-40.01%)	⬇️
...c/napari_micromanager/_gui_objects/_save_widget.py	90.62% <100.00%> (ø)
src/napari_micromanager/_mda_meta.py	100.00% <100.00%> (ø)
...pari_micromanager/_gui_objects/_shutters_widget.py	89.18% <0.00%> (-10.82%)	⬇️
... and 4 more

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[ianhi]

nice!