Add net/netip to random expr imports

[plunkettscott]

The pgtypes.Inet type uses net/netip in its RandomExpr, but does not add it to the import list for the RandomExprImports. This results in a compilation error for the factory package if no other type exists which also imports the netip package.

I've worked around this in my projects by re-defining the type with the proper import until this can be merged.

[stephenafamo]

Kindly add a note in CHANGELOG.md with appropriate attribution (thanks @plunkettscott)

[plunkettscott]

Done

[plunkettscott]

Any estimate on when you plan to tag a release with this fix? Having to copy/paste a config across projects right now in the current state to avoid compilation errors.

[stephenafamo]

Tagged @plunkettscott