chore(deps): update dependency nunit to 4.4.0 (#61)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

src/Directory.Packages.props

@@ -12,7 +12,7 @@
         <PackageVersion Include="AwesomeAssertions" Version="9.1.0" />
 
         <PackageVersion Include="NUnit3TestAdapter" Version="5.1.0" />
-        <PackageVersion Include="NUnit" Version="4.3.2" />
+        <PackageVersion Include="NUnit" Version="4.4.0" />
 
         <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
         <PackageVersion Include="MSTest.TestAdapter" Version="3.10.3" />