Javascript's dotenv port to OCaml

Small lib to allow storing config separate from code.

Dotenv loads variables from a file (named by default .env, hence the name) into the application environment. They can be read in Sys.env.

This allows for the user to reproduce the deployed environments locally, as if the application was deployed in said environments.

This is a port of JavaScript's Dotenv (https://github.com/motdotla/dotenv).