EventSourceEncoder is a Elixir library to encode data into EventSource compliant data.
iex> EventSourceEncoder.encode(1, "This is data")
"id: 1\\ndata: This is data\\n\\n"
iex> EventSourceEncoder.encode(1, "This is new data", :login)
"id: 1\\nevent: login\\ndata: This is new data\\n\\n"