CI broken - cannot compile plug

[counterleft]

Travis CI output:

==> plug
warning: the dependency :plug requires Elixir "~> 1.2.3 or ~> 1.3" but you are running on v1.1.1
Compiled lib/plug/mime.ex
Compiled lib/plug/html.ex
Compiled lib/plug/conn/adapter.ex
Compiled lib/plug.ex
Compiled lib/plug/crypto.ex
Compiled lib/plug/conn/unfetched.ex
Compiled lib/plug/logger.ex
Compiled lib/plug/supervisor.ex
Compiled lib/plug/request_id.ex
Compiled lib/plug/crypto/key_generator.ex
Compiled lib/plug/session/store.ex
Compiled lib/plug/conn/wrapper_error.ex
Compiled lib/plug/error_handler.ex
Compiled lib/plug/session.ex
Compiled lib/plug/session/ets.ex

== Compilation error on file lib/plug/crypto/message_verifier.ex ==
** (CompileError) lib/plug/crypto/message_verifier.ex:105: function '<-'/2 undefined
    (stdlib) lists.erl:1336: :lists.foreach/2
    (stdlib) erl_eval.erl:657: :erl_eval.do_apply/6

could not compile dependency :plug, "mix compile" failed. You can recompile this dependency with "mix deps.compile plug", update it with "mix deps.update plug" or clean it with "mix deps.clean plug"

Would moving to elixir v1.3 from v1.1.1 in .travis.yml do the trick?

[jeregrine]

Thank you for bringing this to my attention. I have fixed it!