Use `--enable-source-maps` instead of `source-map-support`

@itamar244 đang làm issue này rồi.

Từ ngày 10/10/2020.

Starting from version 12.12.0, Node.js offers built-in support for translating error stack traces using source maps - learn more here: https://medium.com/@nodejs/source-maps-in-node-js-482872b56116

Let's rework `@loopback/build` to use this new feature on recent version of Node.js, instead of `source-map-support` module.

If it's possible, then implement a fallback to npm module `source-map-support` when running on Node.js 10.x.

If that's not possible, then this change must wait until we can drop support for Node.js 10.x, which will happen after 10.x reaches EOL on 2021-04-30 per https://github.com/nodejs/Release.