Extract Random Number Generator

The random number generator used in this package is generic: meaning that it can be used for other use-cases like games. It should still be plenty of performant and extracting it into its own package might make audits easier.

This should be done before #5.

The issue names no files, tests, or entry points. Start by locating the package's current random number generator and reviewing its Node, browser, and React Native usage. Done means the generator is extracted into a separate package without losing the supported environments, with the existing package updated to use it.

Written by the indexing model from the issue text.