export default interface not highlighted properly

[mjbvz]

TS and JS Grammar Extension version: 0.0.43 / latest

Code

export default interface IFoo {
    x: string;
}

The contents of the interface lacks syntax highlighting:

[gluons]

Thank you very much.

FYI: My code here. (https://github.com/gluons/vue-pack/blob/997ad7b69ab14b64145dfa04651ec56ab3a4cd75/packages/%40gluons/types/src/Configuration.ts)