Function map

map<V, X>(it, f): AsyncGenerator<Awaited<X>, void, unknown>
Maps an iterable through function f
```
// For every input value, multiply it by itself
map([1, 2, 3], e => e*e)
// Yields: 1, 4, 9
```
It can also be used to transform types:
```
map([1, 2, 3], e => { value: e });
// Yields: { value: 1 }, { value: 2 }, { value: 3 }
```
Type Parameters
- V
- X
Parameters
- it: AsyncIterable<V>
- f: ((v: V) => X)
  - - (v): X
    - Parameters
      v: V
      Returns X
Returns AsyncGenerator<Awaited<X>, void, unknown>