Update testing packages

Author: bording

LibGit2Sharp.Tests/LibGit2Sharp.Tests.csproj

@@ -13,13 +13,13 @@
 
   <ItemGroup>
     <PackageReference Include="coverlet.msbuild" Version="2.7.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.4.0" />
-    <PackageReference Include="Moq" Version="4.10.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.10.0" />
+    <PackageReference Include="Moq" Version="4.16.1" />
     <PackageReference Include="System.ValueTuple" Version="4.5.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.console" Version="2.4.1" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />
-    <PackageReference Include="xunit.skippablefact" Version="1.3.12" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3" />
+    <PackageReference Include="xunit.skippablefact" Version="1.4.13" />
   </ItemGroup>
 
   <ItemGroup>