demo/with_monaco: update monaco editor and enable enableSchemaRequest

demo/with_monaco/index.html

@@ -9,7 +9,7 @@
 
     <script src="../../rsvp.js"></script>
     <script src="../../renderjs.js"></script>
-    <script src="https://unpkg.com/monaco-editor@0.14.3/min/vs/loader.js"></script>
+    <script src="https://unpkg.com/monaco-editor@0.15.5/min/vs/loader.js"></script>
     <script src="index.js"></script>
   </head>
 

demo/with_monaco/index.js

@@ -19,15 +19,15 @@
   */
 
   require.config({
-    paths: {vs: "https://unpkg.com/monaco-editor@0.14.3/min/vs"}
+    paths: {vs: "https://unpkg.com/monaco-editor@0.15.5/min/vs"}
   });
   let proxy = URL.createObjectURL(
     new Blob(
       [`
 self.MonacoEnvironment = {
-  baseUrl: 'https://unpkg.com/monaco-editor@0.14.3/min/'
+  baseUrl: 'https://unpkg.com/monaco-editor@0.15.5/min/'
 };
-importScripts('https://unpkg.com/monaco-editor@0.14.3/min/vs/base/worker/workerMain.js');
+importScripts('https://unpkg.com/monaco-editor@0.15.5/min/vs/base/worker/workerMain.js');
 `
       ],
       {type: "text/javascript"}
@@ -90,6 +90,7 @@ importScripts('https://unpkg.com/monaco-editor@0.14.3/min/vs/base/worker/workerM
 
           monaco.languages.json.jsonDefaults.setDiagnosticsOptions({
             validate: true,
+            enableSchemaRequest: true,
             schemas: schemas
           });