Non Consumable restoration not working.

## Bug Report
I am trying to restore my Non-Consumable product. But It's showing not purchased when debugging.

Xcode 12.5
iOS 14
SwiftyStoreKit - 0.16.1

```
func verifySubscriptionNonConsumeable(product : RegisteredPurchase, isSilent : Bool = false) {
let appleValidator = AppleReceiptValidator(service: .production, sharedSecret: sharedSecret)
SwiftyStoreKit.verifyReceipt(using: appleValidator) { result in

switch result {
case .success(let receipt):
let productId = product.rawValue
// Verify the purchase of a Subscription
let purchaseResult = SwiftyStoreKit.verifySubscription(
ofType: .nonRenewing(validDuration: 3742374737), // or .nonRenewing (see below)
productId: productId,
inReceipt: receipt)

switch purchaseResult {
case .purchased(let expiryDate, let items):
self.showAlert(alert: self.alertWithTitle(title: "Success", message: "Lifetime restored successfully"))

case .expired(let expiryDate, let items):
print("\(productId) is expired since \(expiryDate)\n\(items)\n")
self.setPurchasesInValid(product: productId)

case .notPurchased:
print("The user has never purchased \(productId)")
self.setPurchasesInValid(product: productId)
}

case .error(let error):
print("Receipt verification failed: \(error)")
}
}
}

```

## Additional context
Previously its worked when Xcode 12 and SwiftyStoreKit 0.15.0. But after update Xcode and podfile its not working