added copy to ext/ressources/public/js

Gruntfile.js

@@ -273,6 +273,13 @@ module.exports = function (grunt) {
                         dest: "js/fullCalendar",
                         expand: true,
                         flatten: false
+                    },
+                    {
+                        cwd: 'node_modules/@fullcalendar/',
+                        src: '**',
+                        dest: typo3_js + "/fullCalendar",
+                        expand: true,
+                        flatten: false
                     }
                 ]
             },