[260] Register component does not work.

I added the vue-multiselect component in plugins folder, but it does not work:

plugins/

import Vue from 'vue';

// Include bootstrap JS only
if (process.BROWSER_BUILD) {
  // register globally
  var VueMultiselect = require('vue-multiselect');
  Vue.component(VueMultiselect);
}

vendor:

vendor: ['jquery', 'tether', 'bootstrap', 'vue-multiselect', 'vee-validate', 'vue-resource']