Bump NUnit from 3.13.2 to 3.13.3

Bumps [NUnit](https://github.com/nunit/nunit) from 3.13.2 to 3.13.3.
- [Release notes](https://github.com/nunit/nunit/releases)
- [Changelog](https://github.com/nunit/nunit/blob/v3.13.3/CHANGES.md)
- [Commits](nunit/nunit@v3.13.2...v3.13.3)

---
updated-dependencies:
- dependency-name: NUnit
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Gu.Roslyn.Asserts.Analyzers.Tests/Gu.Roslyn.Asserts.Analyzers.Tests.csproj

@@ -27,7 +27,7 @@
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.0.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.1.0" />
     <PackageReference Include="Microsoft.VisualStudio.Threading.Analyzers" Version="17.1.46" PrivateAssets="all" />
-    <PackageReference Include="NUnit" Version="3.13.2" />
+    <PackageReference Include="NUnit" Version="3.13.3" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
     <PackageReference Include="PropertyChangedAnalyzers" Version="4.0.0" PrivateAssets="all" />
     <PackageReference Include="ReflectionAnalyzers" Version="0.3.1" PrivateAssets="all" />

Gu.Roslyn.Asserts.Tests/Gu.Roslyn.Asserts.Tests.csproj

@@ -28,7 +28,7 @@
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Scripting" Version="4.0.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.1.0" />
     <PackageReference Include="Microsoft.VisualStudio.Threading.Analyzers" Version="17.1.46" PrivateAssets="all" />
-    <PackageReference Include="NUnit" Version="3.13.2" />
+    <PackageReference Include="NUnit" Version="3.13.3" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
     <PackageReference Include="PropertyChangedAnalyzers" Version="4.0.0" PrivateAssets="all" />
     <PackageReference Include="ReflectionAnalyzers" Version="0.3.1" PrivateAssets="all" />