add net5 test host

Author: leastprivilege

test/Tests/Tests.csproj

@@ -15,6 +15,16 @@
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="FluentAssertions" Version="5.10.3" />
 
+    
+  </ItemGroup>
+
+  <ItemGroup Condition=" '$(TargetFramework)' == 'netcoreapp3.1' ">
     <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="3.1.0" />
   </ItemGroup>
+
+  <ItemGroup Condition=" '$(TargetFramework)' == 'net5.0' ">
+    <PackageReference Include="Microsoft.AspNetCore.TestHost" Version="5.0.0" />
+  </ItemGroup>
+  
+  
 </Project>