Bump NUnit from 4.6.1 to 5.0.0

---
updated-dependencies:
- dependency-name: NUnit
  dependency-version: 5.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

Tests/CsvLINQPadDriverTest/CsvLINQPadDriverTest.csproj

@@ -90,7 +90,7 @@
     <PackageReference Include="LPRun" Version="9.11.8" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.10.0" />
     <PackageReference Include="Moq" Version="4.20.72" />
-    <PackageReference Include="NUnit" Version="4.6.1" />
+    <PackageReference Include="NUnit" Version="5.0.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="6.3.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>