differenceInYears
import { differenceInYears } from "https://esm.sh/v135/date-fns@3.6.0/index.d.mts";@example
// How many full years are between 31 December 2013 and 11 February 2015?
const result = differenceInYears(new Date(2015, 1, 11), new Date(2013, 11, 31))
//=> 1
function differenceInYears<DateType extends Date>(dateLeft: DateType | number | string, dateRight: DateType | number | string): number;