react-flatpickr no longer works with the monthSelectPlugin in version 4.0.10

[bertoverflow]

Hello,

thanks for providing this library.

We are using your react wrapper for flatpickr with the monthSelectPlugin (https://flatpickr.js.org/plugins/#monthselectplugin).

Our code is roughly like that:

<Flatpickr
	ref={flatPickrRef}
	onChange={onFlatpickrChange}
	options={{
		plugins: [
			monthSelectPlugin({
				altFormat: "F Y",
				dateFormat: "F Y",
				shorthand: false,
			}),
		],
	}}
/>

This worked in version 3.10.13 of react-flatpickr. However, after updating to version 4.0.10 the month selector still works functionally, but throws an error whenever it closes:

TypeError: Cannot read properties of undefined (reading 'closeOnSelect')
 ❯ HTMLSpanElement.selectMonth ../../node_modules/flatpickr/dist/plugins/monthSelect/index.js:185:31
    183|                     return; // necessary??
    184|                 setMonth(eventTarget.dateObj);
    185|                 if (fp.config.closeOnSelect) {
       |                               ^
    186|                     var single = fp.config.mode === "single";
    187|                     var range = fp.config.mode === "range" && fp.selectedDates.length === 2;

We would really appreciate if you could have a look into this :) Do you need any more information?