(objectivec) some keywords need to be moved to `type`

[joshgoebel]

Types are mixed in with keywords and should be split out.

[ElijahPepe]

I'll try to take this issue. What exactly needs to be moved/split?

[joshgoebel]

What exactly needs to be moved/split?

The keywords that really are data types, not language keywords. Should be moved to keywords/type rather than keywords/keyword. You can find examples in many of the other grammars that split these out.

[joshgoebel]

@ElijahPepe Could you have a look at: #3499