Add docs dependency for publishing.

Author: mgwidmann

mix.exs

@@ -33,6 +33,8 @@ defmodule PatternTap.Mixfile do
   #
   # Type `mix help deps` for more examples and options
   defp deps do
-    []
+    [
+      {:ex_doc, ">= 0.0.0", only: :dev}
+    ]
   end
 end

mix.lock

@@ -0,0 +1,2 @@
+%{"earmark": {:hex, :earmark, "1.2.2", "f718159d6b65068e8daeef709ccddae5f7fdc770707d82e7d126f584cd925b74", [:mix], [], "hexpm"},
+  "ex_doc": {:hex, :ex_doc, "0.16.2", "3b3e210ebcd85a7c76b4e73f85c5640c011d2a0b2f06dcdf5acdb2ae904e5084", [:mix], [{:earmark, "~> 1.1", [hex: :earmark, repo: "hexpm", optional: false]}], "hexpm"}}