Fix up NewtinSoft.Json reference

Author: Steve Ives

FileService/FileService.synproj

@@ -77,10 +77,6 @@
       <Private>true</Private>
     </Reference>
     <Reference Include="mscorlib" />
-    <Reference Include="Newtonsoft.Json, Version=10.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed">
-      <HintPath>..\packages\Newtonsoft.Json.10.0.3\lib\net45\Newtonsoft.Json.dll</HintPath>
-      <Private>true</Private>
-    </Reference>
     <Reference Include="Owin, Version=1.0.0.0, Culture=neutral, PublicKeyToken=f0ebd12fd5e55cc5">
       <HintPath>..\packages\Owin.1.0\lib\net40\Owin.dll</HintPath>
       <Private>true</Private>
@@ -112,6 +108,7 @@
       <HintPath>..\packages\Microsoft.AspNet.WebApi.WebHost.5.2.9\lib\net45\System.Web.Http.WebHost.dll</HintPath>
       <Private>true</Private>
     </Reference>
+	  <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="FileService.dbl">