Merge pull request #251 from taulazer/dependabot/nuget/NUnit3TestAdapter-4.2.1

Bump NUnit3TestAdapter from 4.1.0 to 4.2.1

Author: LumpBloom7

osu.Game.Rulesets.Tau.Tests/osu.Game.Rulesets.Tau.Tests.csproj

@@ -14,7 +14,7 @@
     <PackageReference Include="Appveyor.TestLogger" Version="2.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.1.0" />
     <PackageReference Include="NUnit" Version="3.13.2" />
-    <PackageReference Include="NUnit3TestAdapter" Version="4.1.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\osu.Game.Rulesets.Tau\osu.Game.Rulesets.Tau.csproj" />