after re purchasing a non consumable product the callback are not being called

### Platform

- [x] iOS
- [ ] macOS
- [ ] tvOS

### In app purchase type

- [ ] Consumable
- [x] Non-consumable
- [ ] Auto-Renewable Subscription
- [ ] Non-Renewing Subscription

### Environment

- [x] Sandbox
- [ ] Production

### Version
0.13.3

### Related issues
https://github.com/bizz84/SwiftyStoreKit/issues/400

## Report

### Issue summary
When I tried to repurchase a non consumable product the purchase succeeded, but the callback for finishing the transaction was never called.

### What did you expect to happen
The callback needs to be called to verify and enable the product after the purchase

### What happened instead
No callback was called after purchasing a non consumable for both SwiftyStoreKit.purchaseProduct and SwiftyStoreKit.shouldAddStorePaymentHandler.