React Native agent v1.9.3

Improvements and enhancements

• Updated the Native Android agent to version 7.8.4. Updated the Native iOS agent to version 7.7.9. (#336)

Bug fixes

• Fixed the opt-in Swift Package Manager integration (NEWRELIC_USE_SPM=1): apps no longer crash at launch with Library not loaded: @rpath/NewRelic.framework/NewRelic, archives no longer fail on a duplicate xcframework signature, and the iOS agent resolves to the newest 7.7.x release. (#334)