Bump NUnit.Analyzers from 3.8.0 to 3.9.0

Bumps [NUnit.Analyzers](https://github.com/nunit/nunit.analyzers) from 3.8.0 to 3.9.0.
- [Release notes](https://github.com/nunit/nunit.analyzers/releases)
- [Changelog](https://github.com/nunit/nunit.analyzers/blob/master/CHANGES.txt)
- [Commits](nunit/nunit.analyzers@3.8.0...3.9.0)

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

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

LineReader.Tests/LineReader.Tests.csproj

@@ -12,7 +12,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
     <PackageReference Include="NUnit" Version="3.13.3" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
-    <PackageReference Include="NUnit.Analyzers" Version="3.8.0" />
+    <PackageReference Include="NUnit.Analyzers" Version="3.9.0" />
     <PackageReference Include="coverlet.collector" Version="6.0.0" />
   </ItemGroup>