Bump xunit to 2.4.2

Author: kzu

src/AssemblyFixture/AssemblyFixture.csproj

@@ -13,7 +13,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="all" />
-    <PackageReference Include="xunit" Version="2.4.1" />
+    <PackageReference Include="xunit" Version="2.4.2" />
     <PackageReference Include="NuGetizer" Version="1.0.1" />
     <PackageReference Include="xunit.abstractions" Version="2.0.3" />
   </ItemGroup>