Add traversable to bootstrap
Add traversable to bootstrap

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