reduce.right

reduces from the right

works on `Array` and `String`

should work for sync and async provided functions.

should return a sync value if provided function is sync

```javascript

reduce.right((a, b) => a.concat(b), [])([1, 2, 3, 4, 5]) // > [5, 4, 3, 2, 1]

reduce.right((a, b) => a + b)('12345') // > '54321'

reduce.right((a, b) => Promise.resolve(a + b))('12345') // > Promise { '54321' }
```