Remove a deprecated module on OTP 19

.travis.yml

@@ -1,8 +1,9 @@
 language: elixir
 elixir:
-  - 1.3.0
+  - 1.3.1
   - 1.2.6
 otp_release:
+  - 19.0
   - 18.3
   - 18.2
 before_install:

lib/cachex/notifier.ex

@@ -43,7 +43,7 @@ defmodule Cachex.Notifier do
     send(ref, { :notify, { :async, payload } })
   end
   defp emit(%Hook{ "async": false } = hook, payload) do
-    msg = :random.uniform(1000) - 1
+    msg = :rand.uniform(1000) - 1
     send(hook.ref, { :notify, { :sync, { self, msg }, payload } })
     wait(hook, msg)
   end

mix.exs

@@ -67,7 +67,6 @@ defmodule Cachex.Mixfile do
       { :benchfella,   "~> 0.3.2",  optional: true, only: [ :dev, :test ] },
       { :benchwarmer,  "~> 0.0.2",  optional: true, only: [ :dev, :test ] },
       { :credo,        "~> 0.4.5",  optional: true, only: [ :dev, :test ] },
-      { :earmark,      "~> 0.2.1",  optional: true, only: [ :dev, :test ] },
       { :ex_doc,       "~> 0.12.0", optional: true, only: [ :dev, :test ] },
       { :excoveralls,  "~> 0.5.5",  optional: true, only: [ :dev, :test ] },
       { :exprof,       "~> 0.2.0",  optional: true, only: [ :dev, :test ] },

mix.lock

@@ -10,7 +10,7 @@
   "exjsx": {:hex, :exjsx, "3.2.0", "7136cc739ace295fc74c378f33699e5145bead4fdc1b4799822d0287489136fb", [:mix], [{:jsx, "~> 2.6.2", [hex: :jsx, optional: false]}]},
   "exprintf": {:hex, :exprintf, "0.1.6", "b5b0a38bf78a357dbc61cdf7364fea004af6fdf5214be44021eb2ea7edf61f6e", [:mix], []},
   "exprof": {:hex, :exprof, "0.2.0", "b03f50d0d33e2f18c8e047d9188ba765dc32daba0b553ed717a98a78561d5eaf", [:mix], [{:exprintf, "~> 0.1", [hex: :exprintf, optional: false]}]},
-  "hackney": {:hex, :hackney, "1.6.0", "8d1e9440c9edf23bf5e5e2fe0c71de03eb265103b72901337394c840eec679ac", [:rebar3], [{:ssl_verify_fun, "1.1.0", [hex: :ssl_verify_fun, optional: false]}, {:mimerl, "1.0.2", [hex: :mimerl, optional: false]}, {:metrics, "1.0.1", [hex: :metrics, optional: false]}, {:idna, "1.2.0", [hex: :idna, optional: false]}, {:certifi, "0.4.0", [hex: :certifi, optional: false]}]},
+  "hackney": {:hex, :hackney, "1.6.1", "ddd22d42db2b50e6a155439c8811b8f6df61a4395de10509714ad2751c6da817", [:rebar3], [{:ssl_verify_fun, "1.1.0", [hex: :ssl_verify_fun, optional: false]}, {:mimerl, "1.0.2", [hex: :mimerl, optional: false]}, {:metrics, "1.0.1", [hex: :metrics, optional: false]}, {:idna, "1.2.0", [hex: :idna, optional: false]}, {:certifi, "0.4.0", [hex: :certifi, optional: false]}]},
   "idna": {:hex, :idna, "1.2.0", "ac62ee99da068f43c50dc69acf700e03a62a348360126260e87f2b54eced86b2", [:rebar3], []},
   "jsx": {:hex, :jsx, "2.6.2", "213721e058da0587a4bce3cc8a00ff6684ced229c8f9223245c6ff2c88fbaa5a", [:mix, :rebar], []},
   "metrics": {:hex, :metrics, "1.0.1", "25f094dea2cda98213cecc3aeff09e940299d950904393b2a29d191c346a8486", [:rebar3], []},

test/test_helper.exs

@@ -20,8 +20,6 @@ defmodule TestHelper do
   end
 
   def gen_random_string_of_length(num) when is_number(num) do
-    :random.seed(:erlang.system_time)
-
     letters =
       ?a..?z
       |> Enum.to_list