README
@4c/envy
import * as Envy from '@4c/envy`
Envy.get('NODE_ENV') // 'production'
Envy.get('NOT_SET_VAR') // Error
Envy.get('NOT_SET_VAR', 'default_value') // 'default_value'
Envy.load('test') // adds variables-test.env to process.env
Envy.define('test') // returns variables-test.env mapped to an object keyed by process.env.[foo] for use in webpack