Release 0.2.0

• Add lazy loading, mock Stripe, and improve test coverage (3b524fc)
• Add code coverage, only do coverage on ember releases, strip down integration tests, update .gitignore, update Ember to 2.14.2, run ember-modules-codemod (a69b630)
• Add stripe element and event to actions, schedule running Elements setup after insert to avoid rerender loop, add yarn.lock, include Stripe Element and event in actions, add complete action and send error, add eslint, fix eslint errors and remove phantomjs, update travis.yml, update ember-try, add testem args for chrome (5e9478b)
• Add paymentRequest to Stripe shim (#16) (f715078)
• ability to share elements when using stripe-card-* components (b559ff1)
• Add createSource, retrieveSource to stripev3 service (1875021)