adding support for new coupon duration attributes

[shulmang]

Description:
Add support for new coupon duration attributes (duration, temporal_unit, temporal_amount)

Additional approvers:
@bhelx

Testing:

• Verify that new coupons can be created with duration=forever/single_use/temporal, single_use=true, & applies_for_months=n
• Verify that when reading all of the created coupons the values for duration, temporal_unit, temporal_amount, single_use, & applies_for_months are all correct

function new_coupon() {
  $coupon = new Recurly_Coupon();
  $coupon->coupon_code = uniqid();
  $coupon->name = uniqid();
  $coupon->discount_in_cents->addCurrency('USD',200);
  return $coupon;
}


$coupon = new_coupon();
$coupon->duration = 'forever';

$coupon->create();
$coupon = Recurly_Coupon::get($coupon->coupon_code);
print($coupon->duration);
print($coupon->temporal_unit);
print($coupon->temporal_amount);
print($coupon->applies_for_months);
print($coupon->single_use);


$coupon = new_coupon();
$coupon->duration = 'single_use';

$coupon->create();
$coupon = Recurly_Coupon::get($coupon->coupon_code);
print($coupon->duration);
print($coupon->temporal_unit);
print($coupon->temporal_amount);
print($coupon->applies_for_months);
print($coupon->single_use);


$coupon = new_coupon();
$coupon->duration = 'temporal';
$coupon->temporal_unit = 'month';
$coupon->temporal_amount = 3;

$coupon->create();
$coupon = Recurly_Coupon::get($coupon->coupon_code);
print($coupon->duration);
print($coupon->temporal_unit);
print($coupon->temporal_amount);
print($coupon->applies_for_months);
print($coupon->single_use);


$coupon = new_coupon();
$coupon->applies_for_months = 3;

$coupon->create();
$coupon = Recurly_Coupon::get($coupon->coupon_code);
print($coupon->duration);
print($coupon->temporal_unit);
print($coupon->temporal_amount);
print($coupon->applies_for_months);
print($coupon->single_use);


$coupon = new_coupon();
$coupon->single_use = true;

$coupon->create();
$coupon = Recurly_Coupon::get($coupon->coupon_code);
print($coupon->duration);
print($coupon->temporal_unit);
print($coupon->temporal_amount);
print($coupon->applies_for_months);
print($coupon->single_use);

[bhelx]

Could you add changelog entry?

[bhelx]

👍