Bump IAP SDK to Android 1.6.8 / iOS 1.6.7

[Armaxis]

Summary

Bump bundled In-App Payments SDK versions:

• iOS: 1.6.5 → 1.6.7
• Android: already at 1.6.8 in android/gradle.properties; updated documentation accordingly

iOS 1.6.6 updates the bundled NetceteraSDK to 2.5.1.0 to address the Visa Device Data Encryption Certificate expiration on 2026-06-08. iOS 1.6.7 is a follow-up patch on top of 1.6.6 that fixes public-header imports in the shipped SquareInAppPaymentsSDK and SquareBuyerVerificationSDK xcframeworks — system-framework imports were using @import module syntax, which fails to resolve in some third-party consumer build contexts. 1.6.7 switches them to #import <Framework/Framework.h>, which works in both module and non-module contexts.

Changes

• SquareInAppPayments.podspec — SquareInAppPaymentsSDK / SquareBuyerVerificationSDK fallback 1.6.5 → 1.6.7
• README.md — supported iOS version 1.6.5 → 1.6.7
• package.json — plugin version 2.0.0 → 2.0.1
• CHANGELOG.md — new v2.0.1 entry
• ios/internal/SQIPBuyerInternal.m — fix a pre-existing race where SQIPBuyerVerificationSDK.shared.verifyWithParameters:viewController: was handed a presenter whose dismissal was still in flight. Under the new React Native architecture, RCTFabricModalHostViewController enforces an in-window-hierarchy check and refuses to be a presenter mid-dismissal, surfacing as Attempt to present ThreeDS_SDK.CustomizedNavController ... whose view is not in the window hierarchy. Now we wait for dismissViewControllerAnimated:completion: to finish, re-query activeRootViewController, and present the verification flow from inside the completion block.

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