Release 2.8.1

What's Changed

• feat(): Added purchaseRejected and apmSuccess events by @darwinmorocho-deuna in https://github.com/DUNA-E-Commmerce/deuna-sdk-android/pull/66

Full Changelog: https://github.com/DUNA-E-Commmerce/deuna-sdk-android/compare/v2.8.0...v2.8.1