Fixed typo manuelly for manually (flutter#2902)

Author: MauScheff

packages/in_app_purchase/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.3.4+3
+
+* Fixed typo 'manuelly' for 'manually'.
+
 ## 0.3.4+2
 
 * Update package:e2e reference to use the local version in the flutter/plugins

packages/in_app_purchase/ios/Classes/InAppPurchasePlugin.m

@@ -187,7 +187,7 @@ - (void)addPayment:(FlutterMethodCall *)call result:(FlutterResult)result {
     result([FlutterError
         errorWithCode:@"storekit_duplicate_product_object"
               message:@"There is a pending transaction for the same product identifier. Please "
-                      @"either wait for it to be finished or finish it manuelly using "
+                      @"either wait for it to be finished or finish it manually using "
                       @"`completePurchase` to avoid edge cases."
 
               details:call.arguments]);

packages/in_app_purchase/ios/Tests/InAppPurchasePluginTest.m

@@ -146,7 +146,7 @@ - (void)testAddPaymentWithSameProductIDWillFail {
                     XCTAssertEqualObjects(
                         error.message,
                         @"There is a pending transaction for the same product identifier. Please "
-                        @"either wait for it to be finished or finish it manuelly using "
+                        @"either wait for it to be finished or finish it manually using "
                         @"`completePurchase` to avoid edge cases.");
                     [expectation fulfill];
                   }];

packages/in_app_purchase/pubspec.yaml

@@ -1,7 +1,7 @@
 name: in_app_purchase
 description: A Flutter plugin for in-app purchases. Exposes APIs for making in-app purchases through the App Store and Google Play.
 homepage: https://github.com/flutter/plugins/tree/master/packages/in_app_purchase
-version: 0.3.4+2
+version: 0.3.4+3
 
 dependencies:
   async: ^2.0.8