Update to version 6.8.0. (intercom#170)

Downgrade android sdk version to 15.4.0 (intercom#167)

* Downgrade android sdk version to 15.4.0

* Upgrade RN version to 6.7.0

Bump Intercom SDK Version (intercom#165)

Update version to 6.5.0 (intercom#160)

* chore: updated version

* updates ios and android sdk version

* change to podfile

updated version to 6.4.0 and ios SDK to 16.5.1 (intercom#153)

bump version to 6.3.0 and bump iOS SDK version to 16.3.2 (intercom#148)

Updated iOS and Android and changed min Android taret

Release 6.1.0 (intercom#137)

- Updated to use iOS SDK 16.1.1
- Updated to use Android SDK 15.3.0

Release 6.0.1 (intercom#136)

🐛 Bug Fixes
- Fixed an issue that was causing a crash when updating a user or logging a user in to Intercom.
- This issue was reported in the Intercom Community Forum [here](https://community.intercom.com/mobile-sdks-24/seeing-crash-on-intercom-sdk-initialization-on-react-native-ios-app-unrecognized-selector-sent-to-instance-on-re-3996) and [here](https://community.intercom.com/mobile-sdks-24/the-app-crashes-on-react-native-0-70-6-2640).

Bumped version (intercom#133)