lauren

This is now public API with #82

Also amend validators to take an option to opt-out of caching (e.g. async validators) TODO: - [ ] Investigate https://github.com/thoov/ember-weakmap

TravisCI no longer has unlimited open source library support, so we'll need to look at alternatives. Maybe GitHub actions?

Closes #126

Add track helper

1

proof of concept: ```js import Ember from 'ember'; const { assign, inject: { service } } = Ember; export default Ember.Helper.extend({ metrics: service(), compute([ event ], params = {}) {...