chore(esm): purer ESM package

[louis-bompart]

ESM support in Node is quite recent, which can cause some hiccups sometimes.
Here, this was due to bad local imports which resulted in the need to use an experimental specifier.
The issue is that specifier is not actively developed at this time: nodejs/node#41087 (comment)

I reevaluated the need for it, and it ain't cool for users to have to specify this kind of thing, it should just work ™️.
So, I read back what I would call "The Bible of howto ESM" and followed the advice listed in here: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c

Mainly, what changed:

• All the local imports use 'absolute specifiers' ¹
• TypeScript has been updated to the nightly version to use the Experimental Support for ECMAScript Modules in Node.js. This should help ensure that the transpiled code adheres strictly to what is required for an ESM.

An alpha release has been made with this code, it can be found on version 0.1.1-alpha1

For the users: just call node ./yourScriptThatDependsOnThisPackage.mjs, no flags whatsoever, and it will work.

Footnotes

1. https://nodejs.org/api/esm.html#import-specifiers ↩

[GermainBergeron]

Tested and validated with node@16.14.0 and pnpm@6.31.0 which was throwing errors previously! Thanks!