Fix arguments for ArrayValue.__array__()

[JamesWrigley]

Not sure how but this was broken on the v1 branch. Maybe from a rebase mistake?

[JamesWrigley]

I found some other issues with __array__():

• The copy=None argument is not supported on numpy v1, tried fixing that with a poor mans version check in 9ac67bd.
• It always returns a numpy array with dtype=object. I suspect this is because of the missing 'first attempt' in v1 compared to main, which I tried adding back in 31e9a8c.

Not entirely sure if my changes are correct though.