feature: Add nullability support

[glennawatson]

No description provided.

[codecov]

Codecov Report

Merging #692 (6d8d53f) into main (d87d6ca) will decrease coverage by 0.37%.
The diff coverage is 61.91%.

@@            Coverage Diff             @@
##             main     #692      +/-   ##
==========================================
- Coverage   71.77%   71.40%   -0.38%     
==========================================
  Files          99       99              
  Lines        4741     4791      +50     
==========================================
+ Hits         3403     3421      +18     
- Misses       1338     1370      +32     

Impacted Files	Coverage Δ
src/Splat.Autofac/SplatAutofacExtensions.cs	100.00% <ø> (ø)
src/Splat.Drawing/Bitmaps/BitmapLoader.cs	0.00% <0.00%> (ø)
src/Splat.Drawing/DefaultPlatformModeDetector.cs	0.00% <0.00%> (ø)
src/Splat.Drawing/PlatformModeDetector.cs	0.00% <0.00%> (ø)
src/Splat.Drawing/Platforms/ReflectionStubs.cs	0.00% <0.00%> (ø)
...lat.Drawing/Platforms/net5/Bitmaps/BitmapMixins.cs	0.00% <0.00%> (ø)
...at.Drawing/Platforms/net5/Maths/PointExtensions.cs	0.00% <0.00%> (ø)
...lat.Drawing/Platforms/net5/Maths/RectExtensions.cs	0.00% <0.00%> (ø)
...lat.Drawing/Platforms/net5/Maths/SizeExtensions.cs	0.00% <0.00%> (ø)
...wing/Platforms/netcoreapp3/Bitmaps/BitmapMixins.cs	0.00% <0.00%> (ø)
... and 47 more

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[github-actions]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.