fix(datepickerPopup): specify dependency on datepicker

- Specify dependency on datepicker module

Closes #5954

Author: christianzzz

Diff for: src/datepickerPopup/index-nocss.js

@@ -5,6 +5,6 @@ require('./popup.js');
 
 var MODULE_NAME = 'ui.bootstrap.module.datepickerPopup';
 
-angular.module(MODULE_NAME, ['ui.bootstrap.datepickerPopup', 'uib/template/datepickerPopup/popup.html']);
+angular.module(MODULE_NAME, ['ui.bootstrap.datepickerPopup', 'uib/template/datepickerPopup/popup.html', 'ui.bootstrap.module.datepicker']);
 
 module.exports = MODULE_NAME;