Bump NUnit from 3.13.3 to 4.3.2 (#218)

Bumps [NUnit](https://github.com/nunit/nunit) from 3.13.3 to 4.3.2.
- [Release notes](https://github.com/nunit/nunit/releases)
- [Changelog](https://github.com/nunit/nunit/blob/main/CHANGES.md)
- [Commits](nunit/nunit@v3.13.3...4.3.2)

---
updated-dependencies:
- dependency-name: NUnit
  dependency-version: 4.3.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

Test/Test.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFramework>net9.0</TargetFramework>
@@ -7,7 +7,7 @@
 
   <ItemGroup>
     <PackageReference Include="log4net" Version="2.0.15" />
-    <PackageReference Include="nunit" Version="3.13.3" />
+    <PackageReference Include="nunit" Version="4.3.2" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.0" />
     <PackageReference Include="SharpPcap" Version="6.2.5" />