[import/export] "Multiple default exports" in Typescript ambient module declarations

[andreubotella]

If a Typescript file (or, more likely, a .d.ts file) has several ambient module declarations with default exports, sometimes they're mistakenly reported as "multiple default exports".

declare module "a" {
  function a(): void;
  export {a as default};
}

declare module "b" {
  function b(): void;
  export {b as default};
}

plugins:
  - import
rules:
  import/export: error

Here's a case where that doesn't happen, though:

declare module "a" {
  export default function a(): void;
}

declare module "b" {
  export default function b(): void;
}