feat: transform/rotate image in shader

[maartenbreddels]

This allows for a fast rotation since we do it in the shader.

[maartenbreddels]

update galata

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.35 :tada:

Comparison is base (d16f038) 50.00% compared to head (66b050e) 50.35%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #103      +/-   ##
==========================================
+ Coverage   50.00%   50.35%   +0.35%     
==========================================
  Files           7        7              
  Lines         140      141       +1     
==========================================
+ Hits           70       71       +1     
  Misses         70       70              

Impacted Files	Coverage Δ
bqplot_image_gl/imagegl.py	95.45% <100.00%> (+0.10%)	:arrow_up:

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