Strips comments inside types

[nickretallack]

If I run babel --plugins babel-plugin-flow-to-typescript on this file:

type t = [
    number, // comment 1
    number, // comment 2
];

It prints this:

type t = [number, number];

The comments got stripped out.

If I run it on this:

type t = {
    a: number, // comment 1
    b: number, // comment 2
};

I get this:

type t = {
  a: number;
  // comment 1
  b: number;
};

One comment was stripped out and the other was moved.