(maint) Update xunit-dotnet monorepo

Author: renovate[bot]

src/WellKnown.Tests/WellKnown.Tests.csproj

@@ -17,9 +17,9 @@
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-        <PackageReference Include="xunit" Version="2.9.2" />
-        <PackageReference Include="xunit.analyzers" Version="1.18.0" />
-        <PackageReference Include="xunit.runner.visualstudio" Version="3.0.0">
+        <PackageReference Include="xunit" Version="2.9.3" />
+        <PackageReference Include="xunit.analyzers" Version="1.20.0" />
+        <PackageReference Include="xunit.runner.visualstudio" Version="3.0.2">
             <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
             <PrivateAssets>all</PrivateAssets>
         </PackageReference>