New version of Upsilon doesn't save data comments by default, so we need to enable that

UpsilonLanguageServer/UpsilonLanguageServer/DiagnosticsProvider.cs

@@ -38,7 +38,8 @@ namespace UpsilonLanguageServer
 
         private static readonly ScriptOptions Options = new ScriptOptions()
         {
-            ThrowExceptionOnError = false
+            ThrowExceptionOnError = false,
+            SaveDataComments = true
         };
 
         private static async Task RealLint(TextDocument document, int maxNumberOfProblems, SessionDocument session,