Install dogma linter

Author: cema-sp

mix.exs

@@ -11,7 +11,8 @@ defmodule AdventOfCode2017.Mixfile do
 
   defp deps do
     [
-      {:credo, "~> 0.8", only: [:dev, :test], runtime: false}
+      {:credo, "~> 0.8", only: [:dev, :test], runtime: false},
+      {:dogma, "~> 0.1", only: :dev},
     ]
   end
 end

mix.lock

@@ -1,2 +1,4 @@
 %{"bunt": {:hex, :bunt, "0.2.0", "951c6e801e8b1d2cbe58ebbd3e616a869061ddadcc4863d0a2182541acae9a38", [], [], "hexpm"},
-  "credo": {:hex, :credo, "0.8.10", "261862bb7363247762e1063713bb85df2bbd84af8d8610d1272cd9c1943bba63", [], [{:bunt, "~> 0.2.0", [hex: :bunt, repo: "hexpm", optional: false]}], "hexpm"}}
+  "credo": {:hex, :credo, "0.8.10", "261862bb7363247762e1063713bb85df2bbd84af8d8610d1272cd9c1943bba63", [], [{:bunt, "~> 0.2.0", [hex: :bunt, repo: "hexpm", optional: false]}], "hexpm"},
+  "dogma": {:hex, :dogma, "0.1.15", "5bceba9054b2b97a4adcb2ab4948ca9245e5258b883946e82d32f785340fd411", [], [{:poison, ">= 2.0.0", [hex: :poison, repo: "hexpm", optional: false]}], "hexpm"},
+  "poison": {:hex, :poison, "3.1.0", "d9eb636610e096f86f25d9a46f35a9facac35609a7591b3be3326e99a0484665", [], [], "hexpm"}}