Bump NUnit3TestAdapter from 6.0.0 to 6.1.0 (#52)

---
updated-dependencies:
- dependency-name: NUnit3TestAdapter
  dependency-version: 6.1.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

test/Diffs.Test.csproj

@@ -15,7 +15,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="NUnit3TestAdapter" Version="6.0.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="6.1.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
   </ItemGroup>