Update Choices.js library to v4.1.3

[moelders]

1.2.0

• Updated to Choices.js v4.1.3. Changes:
  • Renamed property duplicateItems to duplicateItemsAllowed.
  • Renamed property sortFilter to sortFn.
  • Renamed property removeItemsByValue to removeActiveItemsByValue.
  • Renamed property setValueByChoice to setChoiceByValue.
  • Modfied callbackOnCreateTemplates which receives the class names as first argument (this.config.classNames).
• Removed sass-inline-svg dependency because the assets are now bundled along with the CSS.
• Updated TravisCI configuration to publish on tags.
• Updated example.