Composer dependency updates

Merge pull request #29 from yabhq/feat/composer-updates

Update composer dependencies

Add ability to find deleted carts by their ID

Merge pull request #24 from yabhq/feat/cart-find-trashed-by-id

Feat/cart find trashed by

New function for retrieving cart ID

Merge pull request #23 from yabhq/feat/cart-id

Ability to retrieve the cart using its ID

Remove Stripe integration to simplify package functionality

Merge pull request #21 from yabhq/refactor/remove-stripe

Remove Stripe integration and charge logic

Purchaseable items must have a display name

Merge pull request #20 from yabhq/feat/purchaseable-display-name

Ensure that purchaseable items have a display name

Update composer dependencies

v0.16

Update composer.json

Fix issue with conditional logic in checkout resource

Merge pull request #19 from yabhq/feat/tax-logistics

Fix issue with conditional logic in checkout resource

Improved validation of checkout before charge can be processed

Merge pull request #18 from yabhq/feat/tax-logistics

Better checking of required checkout info before payment can be proce…

Update HTTP response codes for failed payments, readme for cart.js integration

Merge pull request #17 from yabhq/fix/cart-payment-status-codes

Update HTTP response codes for failed payments, readme for cart.js in…

Automatically delete cart after payment, better checkout 404 response

Merge pull request #16 from yabhq/fix/checkout-deletion

Automatically delete cart after payment, better checkout 404 response