Fix in 0.3.1 causes import bug with module which has only 1 export

The fix in 0.3.1 cannot fit every case. It causes an error when packaging my App at: https://github.com/cuonghuunguyen/Rocket-Chat-Livechat-Clean

// constants/scheduled-jobs.ts
export const JobID = {
    CLEAN_ROOMS: 'CLEAN_ROOMS',
};

```ts
// scheduled-jobs/clean-rooms.ts
import {JobID} from '../constants/scheduled-jobs';
JobID.CLEAN_ROOMS
^^^ cannot read property CLEAN_ROOMS of undefined

The logs of the Apps CLI is not good so I had to spend hours debugging it 😓 Packaging and Deploying with my own (private) App Packager works fine

RocketChat / Rocket.Chat.Apps-compiler

Fix in 0.3.1 causes import bug with module which has only 1 export #41