Added the ability to pass the options argument with a string for the `date`, `time`, and `date_time` custom field types.
Changed the scope of a method to protected from private to make the class extensible.
Removed a line for debugging.
- Changed the `removed_repeatable_field` callback to be triggered after the element is removed.
- Added the `date_range` custom field type.
- Advanced the version number.
- Applied the changes to the minified version.