printer: Support type parameters on JSX components in TSX

[PartMan7]

Supports actually parsing cases like <Foo<Bar> /> instead of crashing.

Was unsure how to test this, since the existing code inherits from babel-parser's fixtures, and that doesn't currently have any tests of the sort (though it is a supported format).

Please let me know if there's any changes / modifications needed to the PR!

Demonstration on Babel REPL

[eventualbuddha]

I'd add a test to test/jsx.ts.

[PartMan7]

test/jsx.ts is currently only running with babel and esprima, which (please correct me if I'm wrong) don't support TypeScript syntax (eg: tests crash even with <b>{'a' as string}</b>, which is valid and supported TSX). From what I could tell, the TSX tests run for recast are limited to those directly taken from babel-parser's fixtures - could you please point me in the right direction?

[eventualbuddha]

I guess I'd probably create a test/tsx.ts file that parses with the typescript option and put the tests in there.

[PartMan7]

Hope this works!

[eventualbuddha]

Thanks! Published in v0.23.7.