addISOWeekYears
import { addISOWeekYears } from "https://esm.sh/v135/date-fns@3.6.0/index.d.mts";@example
// Add 5 ISO week-numbering years to 2 July 2010:
const result = addISOWeekYears(new Date(2010, 6, 2), 5)
//=> Fri Jn 26 2015 00:00:00
function addISOWeekYears<DateType extends Date>(date: DateType | number | string, amount: number): DateType;