Reports use of a default export as a locally named import.
Rationale: the syntax exists to import default exports expressively, let's use it.
Note that type imports, as used by Flow, are always ignored.
Given:
js
// foo.js
export default 'foo';
export const bar = 'baz';
...these would be valid:
js
import foo from './foo.js';
import foo, { bar } from './foo.js';
...and these would be reported:
js
// message: Using exported name 'bar' as identifier for default export.
import { default as foo } from './foo.js';
import { default as foo, bar } from './foo.js';