random: toShuffled

**Is your feature request related to a problem? Please describe.**

I thought a shuffle method would update an array in place.

**Describe the solution you'd like**

Two methods: `shuffle` and `toShuffled` (similar to built in methods `reverse` and `toReversed`, `sort` and `toSorted`, etc.): one for updating the array in place and the other for returning a new array.

**Describe alternatives you've considered**

Extracting the implementation and maintaining my own in-place shuffle method. That would not be ideal though.