Fix var->let.

@blink1073 originally made this change and released 0.11.2.

jupyterlab/lab.html

@@ -55,7 +55,7 @@ Distributed under the terms of the Modified BSD License.
    * Get the plugins for an entry point.
    */
   var getEntryPoint = function (entryPoint) {
-    let plugins = loader.require(entryPoint);
+    var plugins = loader.require(entryPoint);
     try {
       plugins = loader.extractPlugins(plugins);
     } catch (err) {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "jupyterlab",
-  "version": "0.11.1",
+  "version": "0.11.2",
   "description": "A computational environment for Jupyter.",
   "directories": {
     "lib": "lib/"