Function: deepClone#

const a = { foo: 'bar', obj: { a: 1, b: 2 } };
const b = deepClone(a);
// => a !== b, a.obj !== b.obj

const arr = [1, 2, { a: 3 }];
const clonedArr = deepClone(arr);
// => arr !== clonedArr, arr[2] !== clonedArr[2]