Update startup message (elixir-editors#85)

The startup message now displays "ElixirLs Fork", followed by
the language server's version.

Author: shakram02

apps/elixir_ls_utils/lib/launch.ex

@@ -12,6 +12,11 @@ defmodule ElixirLS.Utils.Launch do
     IO.inspect(System.otp_release(), label: "Erlang version")
   end
 
+  def language_server_version do
+    {:ok, vsn} = :application.get_key(:language_server, :vsn)
+    vsn
+  end
+
   defp load_dot_config do
     path = Path.join(Mix.Utils.mix_home(), "config.exs")
 

apps/language_server/lib/language_server/cli.ex

@@ -7,7 +7,7 @@ defmodule ElixirLS.LanguageServer.CLI do
     Launch.start_mix()
 
     Application.ensure_all_started(:language_server, :temporary)
-    IO.puts("Started ElixirLS")
+    IO.puts("Started ElixirLS Fork v#{Launch.language_server_version()}")
     Launch.print_versions()
 
     Mix.shell(ElixirLS.LanguageServer.MixShell)