New SSL option for 🛠️ Schema Registry

From now on, you can use any available SSL option for the Erlang SSL client (see official docs), and if you do, it will overwrite any other SSL options you might configure.

Example

config :avrora,
  registry_ssl_opts: [verify: :verify_none, reuse_sessions: :save]

Thanks @sstoltze for the release! 💜