Removing package reference for json for .net 5

Author: jbogard

src/HtmlTags/HtmlTags.csproj

@@ -27,20 +27,21 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="System.Text.Json" Version="5.0.0" />
     <PackageReference Include="Microsoft.DotNet.PlatformAbstractions" Version="3.0.0" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="All" />
     <PackageReference Include="MinVer" Version="2.3.1" PrivateAssets="All" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)'=='netstandard2.0'">
+    <PackageReference Include="System.Text.Json" Version="5.0.0" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.ViewFeatures" Version="2.0.0" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Razor" Version="2.0.0" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.TagHelpers" Version="2.0.0" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.DataAnnotations" Version="2.0.0" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)'=='netcoreapp3.1'">
+    <PackageReference Include="System.Text.Json" Version="5.0.0" />
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
   </ItemGroup>