*`default`: `options` must contain any default values
* string values: accepts a string; defaults to an empty string. Accepts an array of strings and defaults to an empty array with `multiple: true` enabled.
* object with `label` and `value` fields: accepts an object with `label` and `value` field or an array of such objects when `multiple: true` is enable. Defaults to no value
*`options`: (**required**) there are two ways to list of options for the dropdown menu:
* string values: the dropdown displays the value directly
* object with `label` and `value` fields: the label displays in the dropdown; the value saves in the file
*`multiple`: accepts a boolean; defaults to `false`
*`min`: minimum number of items; ignored if **multiple** is `false`
*`max`: maximum number of items; ignored if **multiple** is `false`