Combine helpers and utils directories

[raingerber]

Problem description:

data-point/lib has a helpers directory and a utils directory, and helpers/index.js actually exports all the utils functions:

module.exports = Object.assign({}, require('./helpers'), require('../utils'))

https://github.com/ViacomInc/data-point/blob/master/packages/data-point/lib/helpers/index.js#L3

Suggested solution:

Combine the helpers and utils directories, since they both serve the same purpose. It might also make sense to move helpers/type-check-functions.js into the reducer-types directory.