Only use json internally

Author: guuskuiper

src/LibStored.Net/LibStored.Net.csproj

@@ -15,7 +15,7 @@
         <PackageReference Include="NetMQ" Version="4.0.2.1" />
         <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All" />
         <PackageReference Include="MinVer" Version="6.0.0" PrivateAssets="All" />
-        <PackageReference Include="System.Text.Json" Version="9.0.8" GeneratePathProperty="true" />
+        <PackageReference Include="System.Text.Json" Version="9.0.8" PrivateAssets="all" GeneratePathProperty="true" />
     </ItemGroup>
 
     <ItemGroup>