Add dependencies for Swoosh's Mua mail adapter

mix.exs

@@ -153,7 +153,7 @@ defmodule Pleroma.Mixfile do
       {:calendar, "~> 1.0"},
       {:cachex, "~> 3.2"},
       {:tesla, "~> 1.11"},
-      {:castore, "~> 0.1"},
+      {:castore, "~> 1.0"},
       {:cowlib, "~> 2.9", override: true},
       {:gun, "~> 2.0.0-rc.1", override: true},
       {:finch, "~> 0.15"},
@@ -169,6 +169,8 @@ defmodule Pleroma.Mixfile do
       {:swoosh, "~> 1.16.9"},
       {:phoenix_swoosh, "~> 1.1"},
       {:gen_smtp, "~> 0.13"},
+      {:mua, "~> 0.2.0"},
+      {:mail, "~> 0.3.0"},
       {:ex_syslogger, "~> 1.4"},
       {:floki, "~> 0.35"},
       {:timex, "~> 3.6"},