Function each

each<T>(array, func): Promise<T[]>
async version of array.forEach
- iterate through array and await call func with each element and index
Sample:
```
await xaa.each([1, 2, 3], async val => await xaa.delay(val))
```
Type Parameters
- T
Parameters
- array: readonly T[]
  array to each
- func: Consumer<T>
  callback for each
Returns Promise<T[]>
- Defined in src/index.ts:541