Add deprecation for defdelegate list arguments and append_first option. Close #4199.
Add deprecation for defdelegate list arguments and append_first option. Close #4199.

joshprice/elixir,michalmuskala/elixir,beedub/elixir,elixir-lang/elixir,antipax/elixir,gfvcastro/elixir,pedrosnk/elixir,beedub/elixir,kelvinst/elixir,ggcampinho/elixir,antipax/elixir,ggcampinho/elixir,lexmag/elixir,gfvcastro/elixir,lexmag/elixir,kimshrier/elixir,pedrosnk/elixir,kelvinst/elixir,kimshrier/elixir