OAuth scopes for cart discounts, customer groups, tax categories and shipping methods

We added new OAuth scopes for Cart Discounts, Customer Groups, Tax Categories and Shipping Methods. This way you are no longer required to grant scopes for Orders or Customers on API clients that are supposed to have access to these endpoints only.

• [API] Added scope manage_cart_discounts:{projectKey} which grants access to all the APIs for creating, deleting and viewing Cart Discounts
• [API] Added scope view_cart_discounts:{projectKey} which grants access to the APIs for viewing Cart Discounts
• [API] Added scope manage_customer_groups:{projectKey} which grants access to all the APIs for creating, deleting and viewing Customer Groups
• [API] Added scope view_customer_groups:{projectKey} which grants access to the APIs for viewing Customer Groups
• [API] Added scope manage_tax_categories:{projectKey} which grants access to all the APIs for creating, deleting and viewing Tax Categories
• [API] Added scope view_tax_categories:{projectKey} which grants access to the APIs for viewing Tax Categories
• [API] Added scope manage_shipping_methods:{projectKey} which grants access to all the APIs for creating, deleting and viewing Shipping Methods
• [API] Added scope view_shipping_methods:{projectKey} which grants access to the APIs for viewing Shipping Methods