Set DocumentRangeFormattingProvider value to false. (#693)

Author: adamdriscoll

src/PowerShellEditorServices.Protocol/Server/LanguageServer.cs

@@ -224,7 +224,8 @@ await requestContext.SendResult(
                         {
                             TriggerCharacters = new string[] { " " } // TODO: Other characters here?
                         },
-                        DocumentFormattingProvider = false
+                        DocumentFormattingProvider = false,
+                        DocumentRangeFormattingProvider = false
                     }
                 });
         }