An adapter that sends email using the SocketLabs Injection API.

For reference: [SocketLabs API docs](https://inject.docs.socketlabs.com/v1/documentation/introduction

Example

# config/congig.exs
config :sample, Smaple.Mailer
  adapter: Swoosh.Adapters.SocketLabs,
  server_id: "",
  api_key: ""

# lib/sample/mailer.ex
defmodule Sample.Mailer do
  use Swoosh.Mailer, otp_app: :sample
end