Add includes feature

[RobinMalfait]

This PR adds a new includes feature as a continuation of the existing PR #24.

This allows you to check if a certain value is seen in the data. Once it is, it will return early and result in a boolean.

import { pipe, includes } from 'lazy-collections'

let program = pipe(includes(1))

program([1, 2, 3, 4])

// true

Each value is compared using Object.is. This will guarantee that edge cases with NaN also work the same as Array.prototype.includes.

Optionally, you can start searching from a positive index:

import { pipe, includes } from 'lazy-collections'

let program = pipe(includes(1, 1))

program([1, 2, 3, 4])

// false

Closes: #24
Thanks, @AlexVipond!