1.5.0: Implement quality of life methods

Add explisit trials, PreviousSubscription discounts, and some quality of
life methods on the customer

Change Plans

• Remove Plan as a separate model, and integrate them inside subscriptions
• Allow providing plan objects to use in loadProcessor
• Add help methods for subscriptions & plans

Transaction and Subscription states

Merge pull request #7 from enhancv/refactor-statuses

Refactor statuses

Convert to peerDependencies

1.2.2

Fix eslint setting

Validations and Tests

Merge pull request #6 from enhancv/discriminator-type-switching

Add email & name, add test for type switching

Helper methods for the Coupon model

Merge pull request #5 from enhancv/extend-and-update-coupons

Added helper methods to the coupon and test them

Initial Release

1.1.0

Merge branch 'master' of github.com:enhancv/mongoose-subscriptions