Remove then to conform to older Elixir

lib/websockex/conn.ex

@@ -99,7 +99,7 @@ defmodule WebSockex.Conn do
         Keyword.get(opts, :socket_connect_timeout, @socket_connect_timeout_default),
       socket_recv_timeout: Keyword.get(opts, :socket_recv_timeout, @socket_recv_timeout_default),
       ssl_options: Keyword.get(opts, :ssl_options, nil),
-      socket_options: Keyword.get(opts, :socket_options, nil),
+      socket_options: Keyword.get(opts, :socket_options, nil)
     }
   end
 
@@ -148,12 +148,12 @@ defmodule WebSockex.Conn do
     host
     |> to_charlist()
     |> :inet.parse_address()
-    |> then(fn
-      {:error, :einval} -> to_charlist(host)
-      {:ok, addr} -> addr
-    end)
+    |> handle_address()
   end
 
+  defp handle_address({:error, :einval}), do: to_charlist(host)
+  defp handle_address({:ok, addr}), do: addr
+
   @doc """
   Sends data using the `conn_mod` module.
   """
@@ -347,8 +347,8 @@ defmodule WebSockex.Conn do
     ]
   end
 
-
-  defp socket_connection_options(%{socket_options: socket_options}) when not is_nil(socket_options) do
+  defp socket_connection_options(%{socket_options: socket_options})
+       when not is_nil(socket_options) do
     minimal_socket_connection_options()
     |> Keyword.merge(socket_options)
   end
@@ -357,7 +357,6 @@ defmodule WebSockex.Conn do
     minimal_socket_connection_options()
   end
 
-
   # Crazy SSL Stuff (It will be normal SSL stuff when I figure out Erlang's ssl)
 
   defp ssl_connection_options(%{ssl_options: ssl_options}) when not is_nil(ssl_options) do