Concurrent calls to retrieveProductsInfo cause a crash #685

Bug Report

Concurrent calls to retrieveProductsInfo cause a crash

Platform Information

• OS: ALL
• Purchase Type: ALL
• Environment: ALL
• SwiftyStoreKit version: 0.16.1

A spinlock should be added to the inflightRequests property on write?

func testAppleStoreKit() { let productIds :Set<String> = ["productId"] DispatchQueue.concurrentPerform(iterations: 1_000) { idx in SwiftyStoreKit.retrieveProductsInfo(productIds) { results in print(idx) } } }