Update defaults to Erlang v17.4.1 & Elixir v1.0.3
Update defaults to Erlang v17.4.1 & Elixir v1.0.3
danielberkompas/heroku-buildpack-elixir,HashNuke/heroku-buildpack-elixir,hectorip/buildpack-elixir-phoenix,yuku-t/heroku-buildpack-elixir,crigor/buildpack-elixir-mix-env,aerosol/heroku-buildpack-elixir,lbarratt/heroku-buildpack-elixir,fcruxen/heroku-buildpack-elixir,camshaft/heroku-buildpack-elixir