Rate bug fixes and Recharge integration improvements

New improvements are here! 🚀

• We have improved the Recharge date incrementation integration to make sure all scenarios are covered.
• We have fixed a bug with the Carrier Service API rates. If a digital product was the first on the list in a mixed cart, the rates would fail. We now add the ZapietID only to products that require shipping.
• We have fixed a bug where fallback rates weren't working as expected on draft orders when Rates by Distance or Rates by Zip Code apps were integrated within Zapiet - Pickup + Delivery. If you have those apps integrated, their rates should show in a list when adding rates to draft orders.