add syntax highlighting support Flow type annotations

[Hristo Oskov]

Syntax highlighting for TypeScript works really well, but it does not work in the case where I'm writing JavaScript with Flow type annotations.

Flow:

TypeScript:

[Thomas Johansen]

This needs to be addressed in whatever language package you are using for Flow support. Syntax themes are not tied to language grammars.

Please re-open this issue in the correct package repository 🙇