Update docs (I think - these looked out of date)

docs/CheckAndRestorePurchases.md

@@ -6,8 +6,9 @@ When users get a new device or re-install your application it is best practice t
 /// Get all current purchases for a specified product type.
 /// </summary>
 /// <param name="itemType">Type of product</param>
+/// <param name="cancellationToken">Cancel the request</param>
 /// <returns>The current purchases</returns>
-Task<IEnumerable<InAppBillingPurchase>> GetPurchasesAsync(ItemType itemType);
+Task<IEnumerable<InAppBillingPurchase>> GetPurchasesAsync(ItemType itemType, CancellationToken cancellationToken = default);
 ```
 
 When you make a call to restore a purchase it will prompt for the user to sign in if they haven't yet, so take that into consideration.

docs/PurchaseConsumable.md

@@ -23,9 +23,10 @@ Consumables are unique and work a bit different on each platform and the `Consum
 /// <param name="itemType">Type of product being requested</param>
 /// <param name="obfuscatedAccountId">Specifies an optional obfuscated string that is uniquely associated with the user's account in your app.</param>
 /// <param name="obfuscatedProfileId">Specifies an optional obfuscated string that is uniquely associated with the user's profile in your app.</param>
+/// <param name="cancellationToken">Cancel the request.</param>
 /// <returns>Purchase details</returns>
 /// <exception cref="InAppBillingPurchaseException">If an error occurs during processing</exception>
-Task<InAppBillingPurchase> PurchaseAsync(string productId, ItemType itemType, string obfuscatedAccountId = null, string obfuscatedProfileId = null);
+Task<InAppBillingPurchase> PurchaseAsync(string productId, ItemType itemType, string obfuscatedAccountId = null, string obfuscatedProfileId = null, CancellationToken cancellationToken = default);
 ```
 
 #### obfuscatedAccountId & obfuscatedProfileId
@@ -44,9 +45,10 @@ Task<InAppBillingPurchase> PurchaseAsync(string productId, ItemType itemType, st
 /// </summary>
 /// <param name="productId">Id or Sku of product</param>
 /// <param name="transactionIdentifier">Original Purchase Token</param>
+/// <param name="cancellationToken">Cancel the request</param>
 /// <returns>If consumed successful</returns>
 /// <exception cref="InAppBillingPurchaseException">If an error occurs during processing</exception>
-Task<InAppBillingPurchase> ConsumePurchaseAsync(string productId, string transactionIdentifier);
+Task<InAppBillingPurchase> ConsumePurchaseAsync(string productId, string transactionIdentifier, CancellationToken cancellationToken = default);
 ```
 
 

docs/PurchaseNonConsumable.md

@@ -17,9 +17,10 @@ All purchases go through the `PurchaseAsync` method and you must always `Connect
 /// <param name="itemType">Type of product being requested</param>
 /// <param name="obfuscatedAccountId">Specifies an optional obfuscated string that is uniquely associated with the user's account in your app.</param>
 /// <param name="obfuscatedProfileId">Specifies an optional obfuscated string that is uniquely associated with the user's profile in your app.</param>
+/// <param name="cancellationToken">Cancel the request</param>
 /// <returns>Purchase details</returns>
 /// <exception cref="InAppBillingPurchaseException">If an error occurs during processing</exception>
-Task<InAppBillingPurchase> PurchaseAsync(string productId, ItemType itemType, string obfuscatedAccountId = null, string obfuscatedProfileId = null);
+Task<InAppBillingPurchase> PurchaseAsync(string productId, ItemType itemType, string obfuscatedAccountId = null, string obfuscatedProfileId = null, CancellationToken cancellationToken = default);
 ```
 
 On Android you must call `FinalizePurchaseAsync` within 3 days when a purchase is validated. Please read the [Android documentation on Pending Transactions](https://developer.android.com/google/play/billing/integrate#pending) for more information.
@@ -52,7 +53,7 @@ public async Task<bool> PurchaseItem(string productId)
         else if(purchase.State == PurchaseState.Purchased)
         {     
             // only need to finalize if on Android unless you turn off auto finalize on iOS
-             var ack = await CrossInAppBilling.Current.FinalizePurchaseAsync(purchase.TransactionIdentifier);
+             var ack = await CrossInAppBilling.Current.FinalizePurchaseAsync([purchase.TransactionIdentifier]);
 
              // Handle if acknowledge was successful or not
         }

docs/PurchaseSubscription.md

@@ -17,9 +17,10 @@ All purchases go through the `PurchaseAsync` method and you must always `Connect
 /// <param name="itemType">Type of product being requested</param>
 /// <param name="obfuscatedAccountId">Specifies an optional obfuscated string that is uniquely associated with the user's account in your app.</param>
 /// <param name="obfuscatedProfileId">Specifies an optional obfuscated string that is uniquely associated with the user's profile in your app.</param>
+/// <param name="cancellationToken">Cancel the request.</param>
 /// <returns>Purchase details</returns>
 /// <exception cref="InAppBillingPurchaseException">If an error occurs during processing</exception>
-Task<InAppBillingPurchase> PurchaseAsync(string productId, ItemType itemType, string obfuscatedAccountId = null, string obfuscatedProfileId = null);
+Task<InAppBillingPurchase> PurchaseAsync(string productId, ItemType itemType, string obfuscatedAccountId = null, string obfuscatedProfileId = null, CancellationToken cancellationToken = default);
 ```
 
 On Android you must call `FinalizePurchaseAsync` within 3 days when a purchase is validated. Please read the [Android documentation on Pending Transactions](https://developer.android.com/google/play/billing/integrate#pending) for more information.
@@ -52,7 +53,7 @@ public async Task<bool> PurchaseItem(string productId, string payload)
         else if(purchase.State == PurchaseState.Purchased)
         {
             //only needed on android unless you turn off auto finalize
-            var ack = await CrossInAppBilling.Current.FinalizePurchaseAsync(purchase.TransactionIdentifier);
+            var ack = await CrossInAppBilling.Current.FinalizePurchaseAsync([purchase.TransactionIdentifier]);
 
             // Handle if acknowledge was successful or not
         }

docs/SecuringPurchases.md

@@ -3,7 +3,7 @@
 Each platform handles security of In-App Purchases a bit different. To handle this whenever you make a purchase you should use the date from the purchase to validate on your backend.
 
 ## Recommended Reading:
-* [Xamarin.iOS Securing Purchases Documentation](https://developer.xamarin.com/guides/ios/platform_features/in-app_purchasing/transactions_and_verification/#Securing_Purchases)
+* [iOS Securing Purchases Documentation](https://developer.xamarin.com/guides/ios/platform_features/in-app_purchasing/transactions_and_verification/#Securing_Purchases)
 * [Google Play service Security and Design](https://developer.android.com/google/play/billing/billing_best_practices.html)