Allow `base < 5` for package `array`

Hi, I'm preparing the next `array` release for the coming ghc 9.12. The process seems boring because I just need to loosen the upper bound of the `base`, and then make a release. Shall I have a larger range like `base < 5` or are there any restriction in the `base`, so we have to bump the version one by one? Thanks, Lei Zhu