Doesn't work with latest versions

[malonehedges]

In some recent version of tailwind theme('aria') started returning an object with strings as the values, while this plugin expects an array of strings as the values. This causes the plugin to fail when building.

theme('aria') usage: https://github.com/mellambias/tailwind-aria/blob/master/index.js#L46

where it fails due to an assumption of it being an array instead of a string: https://github.com/mellambias/tailwind-aria/blob/master/index.js#L53

[mellambias]

In Tailwind 3.0.23 If the 'aria' attribute does not exist, it returns undefined, however in the 3.3.5 it returns an object.

The solution is to put the attribute on theme
// tailwind.config.js
{
theme: {
aria: {},
plugins: [
require('tailwind-aria'),
],
}