Update NUnit3TestAdapter package to be able to run tests

Author: melted-away

Diff for: src/HtmlDiff.Tests/HtmlDiff.Tests.csproj

@@ -11,7 +11,7 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
     <PackageReference Include="System.Data.DataSetExtensions" Version="4.5.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.0.0" />
     <PackageReference Include="Nunit" Version="3.13.3" />