refactor(transform)!: meta no longer destructurable from defineMeta() call

[xeho91]

This was requested privately by @JReinhold. Is supposed to unlock his work on #213.

For the users, it changes nothing. Unless they were hacking around the internals by destructuring manually meta from defineMeta() call.

tl;dr: In the compiled output:

- const { Story, meta } = defineMeta({
+ const meta = {
  component: Button,
  title: 'hello'
- }); 
+ };
+ const { Story } = defineMeta(meta);

export default meta;

[JReinhold]

Thank you. ❤️