Switch notebook editors to monaco (#239)

* Upgrade nteract packages and related dependencies to make new stateful-component work

* Switch to new monacoEditor

* Configure store using nteract mythic configuration

* Replace CodeMirror with Monaco editor in NotebookReadOnlyRenderer

* Reformat

* Upgrade d3 to latest to resolve d3-selection conflicts with nteract/data-explorer that broke D3ForceGraph

* Upgrade jupyterlab terminal widget to work with latest version of react. Upgrade jupyterlab services to include latest fix for websocket auth

* Update jest test snapshots

* Upgrade packages to fix build issues

* Remove comment

* Fix unit tests

* Fix unit test snapshot

* Remove useless @types/node-fetch

src/Terminal/JupyterLabAppFactory.ts

@@ -1,15 +1,16 @@
 /**
  * JupyterLab applications based on jupyterLab components
  */
-import { ServerConnection, TerminalSession } from "@jupyterlab/services";
+import { ServerConnection, TerminalManager } from "@jupyterlab/services";
 import { Terminal } from "@jupyterlab/terminal";
 import { Panel, Widget } from "@phosphor/widgets";
 
 export class JupyterLabAppFactory {
   public static async createTerminalApp(serverSettings: ServerConnection.ISettings) {
-    const session = await TerminalSession.startNew({
+    const manager = new TerminalManager({
       serverSettings: serverSettings
     });
+    const session = await manager.startNew();
     const term = new Terminal(session, { theme: "dark", shutdownOnClose: true });
 
     if (!term) {
@@ -21,7 +22,7 @@ export class JupyterLabAppFactory {
     term.addClass("terminalWidget");
 
     let panel = new Panel();
-    panel.addWidget(term);
+    panel.addWidget(term as any);
     panel.id = "main";
 
     // Attach the widget to the dom.