Fix compatibility with Python 3.10 and recent versions of PyQt5

[astrofrog]

I've had to remove the bottleneck dependency as it is no longer maintained.

[codecov]

Codecov Report

Merging #2258 (b143f09) into main (d3515d9) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #2258      +/-   ##
==========================================
- Coverage   88.05%   88.03%   -0.03%     
==========================================
  Files         247      247              
  Lines       23169    23136      -33     
==========================================
- Hits        20402    20368      -34     
- Misses       2767     2768       +1     

Impacted Files	Coverage Δ
glue/_deps.py	66.38% <ø> (ø)
glue/utils/array.py	88.06% <100.00%> (-1.43%)	⬇️
glue/utils/qt/app.py	96.00% <100.00%> (ø)
glue/utils/qt/widget_properties.py	95.37% <100.00%> (ø)
glue/viewers/common/qt/data_slice_widget.py	83.21% <100.00%> (ø)
glue/plugins/dendro_viewer/data_factory.py	97.72% <0.00%> (-2.28%)	⬇️

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