Export Container and BaseContainer type is misleading

[cychiuae]

If we look at https://github.com/SkygearIO/skygear-SDK-JS/blob/v1.7.1/packages/skygear-core/lib/index.js and https://github.com/SkygearIO/skygear-SDK-JS/blob/v1.7.1/packages/skygear-core/lib/container.js, we will find that the class Container and BaseContainer aren't exported.

However, because

ts-skygear/index.d.ts

Line 128 in 99da67a

export class BaseContainer {

and

ts-skygear/index.d.ts

Line 132 in 99da67a

export class Container extends BaseContainer {

, we have set a trap for developers.

Consider the following code

// index.ts
import { Container } from 'skygear';

const container = new Container()

The little piece of code can pass typecheck. However, actually it will crash in runtime.

[cychiuae]

cc @limouren @louischan-oursky