Update shared infrastructure

[brianpopow]

Prerequisites

• I have written a descriptive pull-request title
• I have verified that there are no overlapping pull-requests open
• I have verified that I am following matches the existing coding patterns and practice as demonstrated in the repository. These follow strict Stylecop rules 👮.
• I have provided test coverage for my change (where applicable)

Description

This Pull request updates the shared infrastructure submodule and fixes the warnings.

[codecov]

Codecov Report

Merging #169 (6f91008) into master (7ffae70) will decrease coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #169      +/-   ##
==========================================
- Coverage   70.03%   69.98%   -0.05%     
==========================================
  Files          89       89              
  Lines        5209     5201       -8     
  Branches     1062     1062              
==========================================
- Hits         3648     3640       -8     
  Misses       1347     1347              
  Partials      214      214              

Flag	Coverage Δ
unittests	69.98% <100.00%> (-0.05%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...ing/Common/Extensions/GraphicsOptionsExtensions.cs	100.00% <ø> (ø)
src/ImageSharp.Drawing/Processing/Brushes.cs	100.00% <ø> (ø)
src/ImageSharp.Drawing/Processing/ColorStop.cs	100.00% <ø> (ø)
...rc/ImageSharp.Drawing/Processing/DrawingOptions.cs	89.65% <ø> (ø)
src/ImageSharp.Drawing/Processing/GradientBrush.cs	85.96% <ø> (ø)
...ageSharp.Drawing/Processing/LinearGradientBrush.cs	100.00% <ø> (ø)
src/ImageSharp.Drawing/Processing/PatternBrush.cs	83.33% <ø> (ø)
...ageSharp.Drawing/Processing/RadialGradientBrush.cs	100.00% <ø> (ø)
src/ImageSharp.Drawing/Processing/RecolorBrush.cs	96.55% <ø> (ø)
src/ImageSharp.Drawing/Processing/ShapeOptions.cs	100.00% <ø> (ø)
... and 17 more

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[JimBobSquarePants]

Awesome, thanks! 👍