closes https://github.com/data-apis/array-api/issues/707 by adding a note concerning signed zeros when computing the minimum and maximum value. Namely, the order of signed zeros is left unspecified and implementations may choose to return either -0 or +0 when computing the minimum/maximum.
explicitly allows conforming implementations to treat signed zeros as indistinguishable and avoid additional branching.
This PR
-0
or+0
when computing the minimum/maximum.