Base64 encode, decode, escape and unescape for URL applications.
const base64url = require('base64-url')
base64url.encode('Node.js is awesome.')
// returns Tm9kZS5qcyBpcyBhd2Vzb21lLg
base64url.decode('Tm9kZS5qcyBpcyBhd2Vzb21lLg')
// returns Node.js is awesome.
base64url.escape('This+is/goingto+escape==')
// returns This-is_goingto-escape
base64url.unescape('This-is_goingto-escape')
// returns This+is/goingto+escape==
//
// setting a different encoding
//
base64url.encode(string to encode, encoding)
base64url.decode(string to decode, encoding)