updated 3rd party dependencies

Author: lostmsu

src/YOLOv4.csproj

@@ -28,8 +28,8 @@
     <PackageReference Include="LostTech.TensorFlow" Version="1.15.0" />
     <!-- The following is recommended for public projects -->
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="All" />
-    <PackageReference Include="SixLabors.ImageSharp" Version="1.0.1" />
-    <PackageReference Include="System.Drawing.Common" Version="4.7.0" />
+    <PackageReference Include="SixLabors.ImageSharp" Version="1.0.2" />
+    <PackageReference Include="System.Drawing.Common" Version="5.0.0" />
   </ItemGroup>
 
 </Project>

test/YOLOv4.Tests.csproj

@@ -10,7 +10,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.8.3" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">
       <PrivateAssets>all</PrivateAssets>