import { difference } from "https://dotland.deno.dev/x/servest@v1.3.4/vendor/https/deno.land/std/datetime/mod.ts";
Calculate difference between two dates.
Parameters
optional
options: DifferenceOptionsOptions for determining how to respond
example :
datetime.difference(new Date("2020/1/1"),new Date("2020/2/2"),{ units : ["days","months"] })