Accept plain functions in combinators

[gustavoguichard]

This is a work in progress for a POC. The idea is to be able to accept any function in combinators, so we simplify their usage:

const add = (a: number, b: number) => a + b

// from:
const fn = collect({ add: composable(add), toString: map(composable(add), String) })

// to:
const fn = collect({ add, toString: map(add, String) })

TODO:

• [ ] Fix the BranchReturn type
• [ ] Fix some types responsible for merging parameters of functions - when testing collect with a composable and a plain function the parameters resolved to never.

[diogob]

Interesting idea.

[gustavoguichard]

Closing it in favor of #155