Returns true if the year is a leap year.
npm install is-a-leap-yeartrue if the year is a leap year.
sh
$ npm install --save is-a-leap-year
`
Usage
`js
const isLeapYear = require('is-a-leap-year');
console.log(isLeapYear(2004)); // true
console.log(isLeapYear('2004')); // true
console.log(isLeapYear(new Date('2004-01-01'))); // true
``