fix(prefer-export-from): type-import removed when using namespace import

[k-yle]

Currently, this code:

import type * as X from 'foo';
export type { X };

is autofixed to this:

export * as X from 'foo';

which is missing the type modifier.

This PR fixes the issue. First commit adds a test case, second commit fixes the bug

[fisker]

I think this also change the behavior, it only expose type before, now it expose values. Maybe we can export type but not remove the import.

[k-yle]

done, this also affects one existing test case

[fisker]

We can't remove this (unless it's type import).

[fisker]

removeSpecifier can control whether the declaration should be removed if the specifier is the only one. https://github.com/sindresorhus/eslint-plugin-unicorn/blob/main/rules/fix/remove-specifier.js#L12

[k-yle]

sorry, what do you mean by we can't remove this? the diff here is adding the import, not removing it

[sindresorhus]

Bump :)