Explicitly define exports for npm package, closes #134

[RVledder]

Tried it out in a local project and it works. But that's a specific implementation. Also, the tests are green.

Would be interested in any thoughts of a repository maintainer. More info in #134

[RVledder]

Using the test script by @rbuckton in this comment:

Version	(a)	(b)	(c)	(d)
17.0.0	ESM	CommonJS	Warning ³, SyntaxError ¹	TypeError ²
15.4.0	ESM	CommonJS	Warning ³, SyntaxError ¹	TypeError ²
12.20.1	ESM	CommonJS	Warning ³, SyntaxError ¹	TypeError ²
12.18.3	ESM	CommonJS	SyntaxError ¹	TypeError ²
12.7.0*	CommonJS	CommonJS	SyntaxError ¹	ok
12.7.0	Error [ERR_REQUIRE_ESM]

NOTES:
* with --experimental-modules ON
¹ SyntaxError Unexpected token export - Loader tried to load ESM module as CommonJS
² TypeError Unknown file extension ".json" - Loader won't load .json
³ Warning: To load an ES module, set "type": "module" in the package.json or use the .mjs extension.

[prescience-data]

Hopefully this works!
🙏🏻

[RVledder]

So... Is this library still maintained?

[georgebrindeiro]

@rbuckton @DanielRosenwasser @orta could you give us a hand getting this merged? Maybe point us in the right direction of who could/should review and approve it?

[rbuckton]

I merged #135, so this is no longer needed.