Parser requires extra parens on first-class module destructuring

[rickyvetter]

I think this should parse - there may be some conflicts that I'm not aware of and if that's the case I'd love to learn more!

let foo = (module Foo, baz) => Foo.bar(baz);

This version currently parses with no issues.

let foo = ((module Foo), baz) => Foo.bar(baz);

This is closely related to #1605 but the paren wrapping wasn't explicitly called out and I think they can be fixed independently. If it makes sense to merge them then feel free to close this out!