Exponentiation operator transform

Here is a cool feature of es6 involving exponents. In addition to this old shit:

Math.pow(4, 3);
// 64

you can use this cool new exponentiation operator:

// x ** y

let cubed = 4 ** 3;
// same as: 4 * 4 * 4

and then you can even do this:

// x **= y

let a = 2;
a **= 2;
// same as: a = a * a;

let b = 3;
b **= 3;
// same as: b = b * b * b;

works in the Chrome console now - try it out!