Update external references to latest stable versions

Author: brianpopow

tests/Directory.Build.targets

@@ -18,13 +18,13 @@
 
   <ItemGroup>
     <!-- Test Dependencies -->
-    <PackageReference Update="BenchmarkDotNet" Version="0.12.1" />
-    <PackageReference Update="Magick.NET-Q16-AnyCPU" Version="7.22.0" />
-    <PackageReference Update="Moq" Version="4.14.6" />
+    <PackageReference Update="BenchmarkDotNet" Version="0.13.1" />
+    <PackageReference Update="Magick.NET-Q16-AnyCPU" Version="8.33.0" />
+    <PackageReference Update="Moq" Version="4.16.1" />
     <PackageReference Include="runtime.osx.10.10-x64.CoreCompat.System.Drawing" Version="5.8.64" Condition="'$(IsOSX)'=='true'" />
-    <PackageReference Update="System.Drawing.Common" Version="4.7.0" />
+    <PackageReference Update="System.Drawing.Common" Version="5.0.2" />
     <PackageReference Update="GeoJSON.Net" Version="1.2.19" />
-    <PackageReference Update="SkiaSharp" Version="2.80.2" />
+    <PackageReference Update="SkiaSharp" Version="2.80.3" />
   </ItemGroup>
 
 </Project>