Disallow Box low > high and low == inf and high == -inf

[jjshoots]

Description

This disallows the user from creating box spaces where the range is 0.

Fixes #493

Type of change

Please delete options that are not relevant.

• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• I have run the pre-commit checks with pre-commit run --all-files (see CONTRIBUTING.md instructions to set it up)
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[pseudo-rnd-thoughts]

As np.random.uniform(low=0, high=0) is supported, I think we should support this case despite how weird it is to only be able to sample for a single value.

Therefore, I propose you just prevent three cases, np.any(low > high), np.any(low == np.inf) and np.any(high == -np.inf).
I think these are reasonable changes and should address the issue in #493

[pseudo-rnd-thoughts]

@jjshoots Are you happy with the changes that I made? If so, I'm happy to merge

[jjshoots]

@pseudo-rnd-thoughts Yep, SGTM.