Iterable `any`

[dyoder]

We have find but that's not quite the same.

Also, none of our iterable functions take an async function, including find.

We can just add generics for that case, ex:

any = generic name: "any"

generic any, isAsyncFunction, isIterable, ( p, it ) ->
  for i in it
    return true if await p i   
  false

generic any, isRegularFunction, isIterable, ( p, it ) ->
  for i in it
    return true if p i
  false

[dyoder]

Generics wouldn't work for ordinary functions that return a promise.