Proposal: Module renaming for v7

[rowanwins]

If we're working towards a release of v7 then now would be a good time to rename any modules as a breaking change.

• lineIntersect to become intersectionPoints. Rationale being is that this module supports both polygons and lines, and I think the proposed name is a bit clearer as to what it does and returns.

Any other thoughts for candidates @mfedderly @JamesLMilner @twelch ?

[JamesLMilner]

I agree that lineIntersect is a bit confusing considering it works on LineStrings and Polygons. I would be happy to rename it to intersectionPoints if that helps provide clarity to users

[mfedderly]

I don't know of any other renames offhand, but I made a PR for lineIntersect #2187