Support item-specific coupons

[joannasese]

Add item_codes and applies_to_all_items to Coupon

Example:

$coupon = new Recurly_Coupon();
$couponCode = 'special';
$coupon->name = 'Special';
$coupon->coupon_code = $couponCode;
$coupon->discount_type = 'percent';
$coupon->discount_percent = 20;
// `applies_to_all_items` defaults to false, so next line is optional
$coupon->applies_to_all_items = false
$coupon->item_codes = array('item_one', 'item_two', 'item_three');
$coupon->create();

[douglasmiller]

Why is this test being changed?

[joannasese]

According to the docs, plan_codes is an "Array of plan_codes the coupon applies to, if applies_to_all_plans is false." So here, applies_to_all_plans should actually be false.

[douglasmiller]

👍