PayPal Javascript SDK 2019 refactoring

PayPal released new Javascript SDK in February 2019 and this library was refactored to use this sdk. This new library is significantly different then the previous one and therefore there are many breaking changes - too many to list here.

Upgrading

When upgrading from previous version, please be sure to see the new example in main readme, and especially the predefined interfaces directly in code - this should help you set up most common checkout processes. For more advanced configuration and explanation behind certain properties, please check PayPal docs

• Adds intent to paypal payment configuration

• Adds invoice_number to paypal transaction

• Upgrade to Angular 7

Adds experience configuration (https://github.com/Enngage/ngx-paypal/commit/a077b66fb2b19a725b9a3c0c93d3d19947111354)

Extends PayPal configuration properties (https://github.com/Enngage/ngx-paypal/issues/17)

Adds validate callback

• Adds support for multiple buttons and handles script registering properly
• Uses onPush component detection
• Adds layout option for styling button (horizontal/vertical)
• Adds onClick handler executed when user clicks on paypal button
• Updates dev dependencies + refactors scripts

• Switches to ng-packgr library format
• Adds custom param to IPayPalTransaction
• Redesigns sample site