fix: add JS / TS / TSX generator functions

[madlabman]

Treat JavaScript generator expressions as functions declarations.

[stevearc]

Looks good! Can you add this to the tsx parser as well?
Also, it appears that the tests are not passing. You can run them locally with make test

[madlabman]

Looks good! Can you add this to the tsx parser as well? Also, it appears that the tests are not passing. You can run them locally with make test

Updated tsx as well, thank you!

I didn't figure out how to run tests previously, because I had tons of "ShaDa" parsing errors. Now the tests should pass.

[stevearc]

Thanks for the PR!