Avoid minify in react-native in release mode

If you are using the default react-native cli you just need to use --minify false.

e.g.

node node_modules/react-native/local-cli/cli.js bundle --entry-file index.js --platform ios  --minify false --dev false --reset-cache --bundle-output './ios/MobileTravelAdvisor/main.jsbundle' --assets-dest './ios'