Align version requirements (#304)

In #301 I forgot to bump this to 1.1.3, which probably is a harmless
mistake, but it can be good for anyone in the future to have an easier
time making the next release to have this align with the other versions.

js/src/qgrid.widget.js

@@ -36,8 +36,8 @@ class QgridModel extends widgets.DOMWidgetModel {
       _view_name : 'QgridView',
       _model_module : 'qgrid',
       _view_module : 'qgrid',
-      _model_module_version : '^1.1.2',
-      _view_module_version : '^1.1.2',
+      _model_module_version : '^1.1.3',
+      _view_module_version : '^1.1.3',
       _df_json: '',
       _columns: {}
     });