139. implement _.partial()

_.partial() works like Function.prototype.bind() but this is not bound.

please create your own partial()

const func = (...args) => args

const func123 = partial(func, 1,2,3)

func123(4)
// [1,2,3,4]

It should also support placeholder.

const _ = partial.placeholder
const func1_3 = partial(func, 1, _, 3)

func1_3(2,4)
// [1,2,3,4]