Update NewtonSoft.Json dependency from 10.0.3 to 11.02 since PS 6.0 has been deprecated (#981)

* Update NewtonSoft.Json dependency to 11.02 since PowerShell 6.0 has been deprecated. This version of Newtonsoft is the one shipped with PS 6.1. It's  version cannot be higher than the one shipped in PowerShell due to DLL unloading not being possible.

* update dependency in PsesPsClient as well (which is not part of the solution)

Author: bergmeister

src/PowerShellEditorServices.Protocol/PowerShellEditorServices.Protocol.csproj

@@ -14,7 +14,7 @@
     <ProjectReference Include="..\PowerShellEditorServices\PowerShellEditorServices.csproj" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="10.0.3" />
+    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
     <PackageReference Include="PowerShellStandard.Library" Version="5.1.0" PrivateAssets="All" />
     <PackageReference Include="System.IO.Pipes.AccessControl" Version="4.5.1" />
   </ItemGroup>

tools/PsesPsClient/PsesPsClient.csproj

@@ -5,7 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="10.0.3" />
+    <PackageReference Include="Newtonsoft.Json" Version="11.0.2" />
     <PackageReference Include="System.IO.Pipes" Version="4.3.0" />
   </ItemGroup>