Add phash2/1 and phash2/2

[caiopo]

Adds bindings for Erlang's portable hashing function phash2.

I'm not super happy with the name hash_range, but I couldn't think of anything better...

[lpil]

Thank you, I've left a note inline.

Could you update the changelog also please.

[caiopo]

Done, thanks!

[lpil]

Thank you

[lpil]

Hi @caiopo! What were you using this function for? I'm doing some research to figure out improvements for this package.

[caiopo]

Hi @lpil!
I was planning to develop a bloom filter library in Gleam. Inspired by a similar package made in Elixir.
It uses phash2 as its hash function, so it supports adding any term to the filter.

[lpil]

Great, thank you.

I'm refocusing this package on types and functions that most Erlang based programs will use, which means I'll be removing these functions sue to their being niche in use. The code is good so you could publish a package for them if you wish, otherwise you can copy them into your project.