Add mix test.watch

Author: joshsmith

mix.exs

@@ -71,6 +71,7 @@ defmodule CodeCorps.Mixfile do
       {:inflex, "~> 1.9"},
       {:ja_serializer, "~> 0.12"}, # JSON API
       {:joken, "~> 1.5"}, # JWT encoding
+      {:mix_test_watch, "~> 0.5", only: :dev, runtime: false},
       {:money, "~> 1.2.1"},
       {:poison, "~> 3.0", override: true},
       {:scout_apm, "~> 0.0"},

mix.lock

@@ -42,6 +42,7 @@
   "metrics": {:hex, :metrics, "1.0.1", "25f094dea2cda98213cecc3aeff09e940299d950904393b2a29d191c346a8486", [], []},
   "mime": {:hex, :mime, "1.1.0", "01c1d6f4083d8aa5c7b8c246ade95139620ef8effb009edde934e0ec3b28090a", [:mix], []},
   "mimerl": {:hex, :mimerl, "1.0.2", "993f9b0e084083405ed8252b99460c4f0563e41729ab42d9074fd5e52439be88", [], []},
+  "mix_test_watch": {:hex, :mix_test_watch, "0.5.0", "2c322d119a4795c3431380fca2bca5afa4dc07324bd3c0b9f6b2efbdd99f5ed3", [:mix], [{:fs, "~> 0.9.1", [hex: :fs, repo: "hexpm", optional: false]}], "hexpm"},
   "money": {:hex, :money, "1.2.1", "fdcc7b021b894dbcc2cd0f57d2ccdd2224eced747231337a849424ffaa196b13", [:mix], [{:ecto, "~> 1.0 or ~> 2.0 or ~> 2.1", [hex: :ecto, optional: true]}, {:phoenix_html, "~> 2.0", [hex: :phoenix_html, optional: true]}]},
   "msgpax": {:hex, :msgpax, "1.1.0", "e31625e256db2decca1ae2b841f21b4d2483b1332649ce3ebc96c7ff7a4986e3", [:mix], [{:plug, "~> 1.0", [hex: :plug, optional: true]}]},
   "phoenix": {:hex, :phoenix, "1.3.0", "1c01124caa1b4a7af46f2050ff11b267baa3edb441b45dbf243e979cd4c5891b", [:mix], [{:cowboy, "~> 1.0", [hex: :cowboy, optional: true]}, {:phoenix_pubsub, "~> 1.0", [hex: :phoenix_pubsub, optional: false]}, {:plug, "~> 1.3.3 or ~> 1.4", [hex: :plug, optional: false]}, {:poison, "~> 2.2 or ~> 3.0", [hex: :poison, optional: false]}]},