Update to Elixir 1.4 and update all dependencies to latest version.

Author: jkakar

.travis.yml

@@ -1,3 +1,3 @@
 language: elixir
-elixir: 1.4.1
+elixir: 1.4.2
 otp_release: 19.1

mix.exs

@@ -4,7 +4,7 @@ defmodule AWS.CodeGen.Mixfile do
   def project do
     [app: :aws_codegen,
      version: "0.0.1",
-     elixir: "~> 1.0",
+     elixir: "~> 1.4",
      build_embedded: Mix.env == :prod,
      start_permanent: Mix.env == :prod,
      deps: deps()]
@@ -29,6 +29,6 @@ defmodule AWS.CodeGen.Mixfile do
   defp deps do
     [{:earmark, "~> 1.1", only: :dev},
      {:ex_doc, "~> 0.15.0", only: :dev},
-     {:poison, "~> 1.4.0"}]
+     {:poison, "~> 3.1"}]
   end
 end

mix.lock

@@ -1,3 +1,3 @@
 %{"earmark": {:hex, :earmark, "1.1.1", "433136b7f2e99cde88b745b3a0cfc3fbc81fe58b918a09b40fce7f00db4d8187", [:mix], []},
   "ex_doc": {:hex, :ex_doc, "0.15.0", "e73333785eef3488cf9144a6e847d3d647e67d02bd6fdac500687854dd5c599f", [:mix], [{:earmark, "~> 1.1", [hex: :earmark, optional: false]}]},
-  "poison": {:hex, :poison, "1.4.0", "cd5afb9db7f0d19487572fa28185b6d4de647f14235746824e77b3139b79b725", [:mix], []}}
+  "poison": {:hex, :poison, "3.1.0", "d9eb636610e096f86f25d9a46f35a9facac35609a7591b3be3326e99a0484665", [:mix], []}}