Set Erlang version to 20.2.3 for MacOS standalone package
Set Erlang version to 20.2.3 for MacOS standalone package

Fixes rabbitmq/rabbitmq-server-release#77

rabbitmq/rabbitmq-website,rabbitmq/rabbitmq-website,rabbitmq/rabbitmq-website,rabbitmq/rabbitmq-website,rabbitmq/rabbitmq-website