update jupyterlab

Author: SylvainCorlay

js/package.json

@@ -1,6 +1,6 @@
 {
   "name": "jupyter-threejs",
-  "version": "0.1.3",
+  "version": "0.1.4",
   "description": "jupyter - threejs bridge",
   "author": "Jupyter-Threejs development team",
   "license": "BSD",
@@ -21,9 +21,9 @@
   },
   "dependencies": {
     "jquery": "^2.1.4",
-    "jupyter-js-widgets": "^2.0.2",
+    "jupyter-js-widgets": "^2.0.4",
     "jupyterlab" : "^0.5.1",
-    "@jupyterlab/nbwidgets": "^0.3.4",
+    "@jupyterlab/nbwidgets": "^0.4.0",
     "three": "^0.75.0",
     "underscore": "^1.8.3"
   }

js/src/labplugin.js

@@ -1,10 +1,10 @@
 var jupyter_threejs = require('./index');
 
-var jupyterlab_widgets = require('@jupyterlab/nbwidgets/lib/plugin');
+var jupyterlab_widgets = require('@jupyterlab/nbwidgets');
 
 module.exports = {
   id: 'jupyter.extensions.jupyter-threejs',
-  requires: [jupyterlab_widgets.IIPyWidgetExtension],
+  requires: [jupyterlab_widgets.INBWidgetExtension],
   activate: function(app, widgets) {
       widgets.registerWidget({
           name: 'jupyter-threejs',