Run Erlang/OTP 22.1 on travis (#9492)
Run Erlang/OTP 22.1 on travis (#9492)


kimshrier/elixir,michalmuskala/elixir,ggcampinho/elixir,kimshrier/elixir,kelvinst/elixir,pedrosnk/elixir,joshprice/elixir,kelvinst/elixir,pedrosnk/elixir,ggcampinho/elixir,elixir-lang/elixir