RN 0.50+ compat: main queue (chirag04#175)

* main queue

* requiresMainQueueSetup: set to NO

Author: kesha-antonov

InAppUtils/InAppUtils.m

@@ -19,6 +19,10 @@ - (instancetype)init
     return self;
 }
 
++ (BOOL)requiresMainQueueSetup {
+    return NO;
+}
+
 - (dispatch_queue_t)methodQueue
 {
     return dispatch_get_main_queue();
@@ -124,7 +128,7 @@ - (void)paymentQueue:(SKPaymentQueue *)queue
                 callback(@[@"restore_failed"]);
                 break;
         }
-        
+
         [_callbacks removeObjectForKey:key];
     } else {
         RCTLogWarn(@"No callback registered for restore product request.");
@@ -252,7 +256,7 @@ - (NSDictionary *)getPurchaseData:(SKPaymentTransaction *)transaction {
         purchase[@"originalTransactionDate"] = @(originalTransaction.transactionDate.timeIntervalSince1970 * 1000);
         purchase[@"originalTransactionIdentifier"] = originalTransaction.transactionIdentifier;
     }
-    
+
     return purchase;
 }