minor code improvements

ModpackUpdater.Model/UpdateInfos.vb

@@ -1,11 +1,11 @@
-Imports Newtonsoft.Json.Linq
+Imports Newtonsoft.Json
 
 Public Class UpdateInfos
 
     Public ReadOnly Property Updates As New List(Of UpdateInfo)
 
     Public Shared Function Parse(content As String) As UpdateInfos
-        Return JObject.Parse(content).ToObject(Of UpdateInfos)
+        Return JsonConvert.DeserializeObject(Of UpdateInfos)(content)
     End Function
 
 End Class