Fix Catalyst Build Error (#382)

Co-authored-by: Mayank Sanganeria <[email protected]>

Author: JonathanDowning

Leanplum-SDK/Classes/Managers/LPRevenueManager.m

@@ -137,10 +137,12 @@ - (void)addTransaction:(SKPaymentTransaction *)transaction
         NSURL *receiptURL = [[NSBundle mainBundle] appStoreReceiptURL];
         receipt = [NSData dataWithContentsOfURL:receiptURL];
     } else {
+#if !TARGET_OS_MACCATALYST
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
         receipt = transaction.transactionReceipt;
 #pragma GCC diagnostic pop
+#endif
     }
 
     NSString *receiptBase64String = [LPUtils base64EncodedStringFromData:receipt];