Merge pull request #823 from sys27/dependabot/nuget/dev/NUnit-4.3.1

Bump NUnit from 4.3.0 to 4.3.1

Author: sys27

Directory.Packages.props

@@ -3,7 +3,7 @@
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0" />
     <PackageVersion Include="Nerdbank.GitVersioning" Version="3.7.112" />
     <PackageVersion Include="NSubstitute" Version="5.3.0" />
-    <PackageVersion Include="NUnit" Version="4.3.0" />
+    <PackageVersion Include="NUnit" Version="4.3.1" />
     <PackageVersion Include="NUnit.Analyzers" Version="4.4.0" />
     <PackageVersion Include="NUnit3TestAdapter" Version="4.6.0" />
     <PackageVersion Include="StyleCop.Analyzers" Version="1.2.0-beta.556" />