feature: Add .NET 5 support

[glennawatson]

No description provided.

[codecov]

Codecov Report

Merging #627 (b5dbd49) into main (e62f8c0) will decrease coverage by 23.57%.
The diff coverage is 47.89%.

@@             Coverage Diff             @@
##             main     #627       +/-   ##
===========================================
- Coverage   70.47%   46.90%   -23.58%     
===========================================
  Files          75      127       +52     
  Lines        4003     6823     +2820     
===========================================
+ Hits         2821     3200      +379     
- Misses       1182     3623     +2441     

Impacted Files	Coverage Δ
...lat.Drawing/Platforms/net5/Bitmaps/BitmapMixins.cs	0.00% <0.00%> (ø)
...t.Drawing/Platforms/net5/Colors/ColorExtensions.cs	0.00% <0.00%> (ø)
...wing/Platforms/net5/Colors/SplatColorExtensions.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)
.../Splat.Raygun/RaygunFeatureUsageTrackingSession.cs	91.11% <ø> (ø)
src/Splat/ServiceLocation/InternalLocator.cs	83.33% <ø> (ø)
...awing/Platforms/net5/Bitmaps/BitmapSourceBitmap.cs	17.64% <17.64%> (ø)
...ing/Platforms/net5/Bitmaps/PlatformBitmapLoader.cs	52.08% <52.08%> (ø)
... and 56 more

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[glennawatson]

The lower code coverage is correct, since its taking into account a lot more projects now.

[RLittlesII]

some of the sdks might need to be changed.

[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.