Function pairwise

pairwise<T>(): TransformStream<T, [T, T]>
Puts the current value and previous value together as an array, and queues that.
Type Parameters
- T
Returns TransformStream<T, [T, T]>
Example
```
--a----b------c------d------

pairwise()

-------[a,b]--[b,c]--[c,d]--
```
- Defined in packages/stream/src/transformers/pairwise.ts:16