Import without /lib or /es6 paths like fp-ts now does

[osdiab]

🚀 Feature request

Current Behavior

To import specific files in io-ts, you need to import with /lib/ or /es6/ prefixes, like import { Encoder } from "io-ts/lib/Encoder"

Desired Behavior

Don't require that prefix, like import { Encoder } from "io-ts/Encoder"

Suggested Solution

Do what fp-ts is now doing with gcanti/fp-ts#1241 to simplify imports

Who does this impact? Who is this for?

All users who use sub-package imports

Describe alternatives you've considered

handling doing the correct import manually leads to a lot of extra boilerplate in setting up linters to avoid the wrong imports, getting confusing errors when you use the wrong one.

Additional context

fp-ts already shows a proof of concept so would be nice to apply it here.

Your environment

Software	Version(s)
io-ts	2.2.9
fp-ts	2.8.1
TypeScript	3.9.6