Update dependencies + fix stylecop

[JimBobSquarePants]

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

Updates all dependencies and uses new standards submodule for linting.

[codecov]

Codecov Report

Merging #816 into master will decrease coverage by 0.08%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #816      +/-   ##
==========================================
- Coverage   88.73%   88.65%   -0.09%     
==========================================
  Files        1015     1015              
  Lines       44081    44120      +39     
  Branches     3178     3178              
==========================================
- Hits        39117    39116       -1     
- Misses       4236     4241       +5     
- Partials      728      763      +35

Impacted Files	Coverage Δ
...lFormats/Utils/Vector4Converters.RgbaCompatible.cs	93.02% <ø> (ø)	⬆️
...rp/PixelFormats/Utils/Vector4Converters.Default.cs	100% <ø> (ø)	⬆️
src/ImageSharp/Common/Tuples/Octet.cs	90% <ø> (ø)	⬆️
.../ImageSharp/Common/ParallelUtils/ParallelHelper.cs	100% <ø> (ø)	⬆️
...arp/Common/Helpers/SimdUtils.ExtendedIntrinsics.cs	94.52% <ø> (ø)	⬆️
src/ImageSharp/Common/Tuples/Vector4Pair.cs	62.5% <ø> (ø)	⬆️
src/ImageSharp/Memory/RowInterval.cs	100% <ø> (ø)	⬆️
...ImageSharp/Formats/Png/Chunks/PhysicalChunkData.cs	84.84% <ø> (ø)	⬆️
src/ImageSharp/Formats/Bmp/BmpThrowHelper.cs	0% <ø> (ø)	⬆️
...omponents/Encoder/YCbCrForwardConverter{TPixel}.cs	100% <ø> (ø)	⬆️
... and 31 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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[codecov]

Codecov Report

Merging #816 into master will decrease coverage by 0.08%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #816      +/-   ##
==========================================
- Coverage   88.73%   88.65%   -0.09%     
==========================================
  Files        1015     1015              
  Lines       44081    44120      +39     
  Branches     3178     3178              
==========================================
- Hits        39117    39116       -1     
- Misses       4236     4241       +5     
- Partials      728      763      +35

Impacted Files	Coverage Δ
...lFormats/Utils/Vector4Converters.RgbaCompatible.cs	93.02% <ø> (ø)	⬆️
...rp/PixelFormats/Utils/Vector4Converters.Default.cs	100% <ø> (ø)	⬆️
src/ImageSharp/Common/Tuples/Octet.cs	90% <ø> (ø)	⬆️
.../ImageSharp/Common/ParallelUtils/ParallelHelper.cs	100% <ø> (ø)	⬆️
...arp/Common/Helpers/SimdUtils.ExtendedIntrinsics.cs	94.52% <ø> (ø)	⬆️
src/ImageSharp/Common/Tuples/Vector4Pair.cs	62.5% <ø> (ø)	⬆️
src/ImageSharp/Memory/RowInterval.cs	100% <ø> (ø)	⬆️
...ImageSharp/Formats/Png/Chunks/PhysicalChunkData.cs	84.84% <ø> (ø)	⬆️
src/ImageSharp/Formats/Bmp/BmpThrowHelper.cs	0% <ø> (ø)	⬆️
...omponents/Encoder/YCbCrForwardConverter{TPixel}.cs	100% <ø> (ø)	⬆️
... and 31 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update b03d41b...d349e85. Read the comment docs.