Fix sort in < V8 7.0

[davidgilbertson]

V8 7.0 changed the way Array#sort works (so the problem is only in Node.js < 11 and Chrome <70)

In V8 6.x and earlier, something funny is going on when I try to sort using a comparison function. I suspect because with each change to the array, I'm updating state.nextStore, and whatever's happening internally to do the sort is losing a reference.

The pre-7.0 behaviour is explained a bit here: https://v8.dev/blog/array-sort#history

The fix will probably be to bypass all proxies for sort, let the engine do the sort (e.g. on a clone array), then update nextStore with the results.

[davidgilbertson]

Fixed in 5.0.0