lastDayOfISOWeek
import { lastDayOfISOWeek } from "https://esm.sh/v135/date-fns@3.6.0/index.d.mts";
@example
// The last day of an ISO week for 2 September 2014 11:55:00:
const result = lastDayOfISOWeek(new Date(2014, 8, 2, 11, 55, 0))
//=> Sun Sep 07 2014 00:00:00
function lastDayOfISOWeek<DateType extends Date>(date: DateType | number | string): DateType;