update deps and switch to dialyxir

Author: mmmries

config/config.exs

@@ -2,4 +2,6 @@
 # and its dependencies with the aid of the Mix.Config module.
 use Mix.Config
 
-config :excheck, :number_iterations, 100
+if Mix.env == :test do
+  config :excheck, :number_iterations, 100
+end

mix.exs

@@ -30,12 +30,10 @@ defmodule Sqlitex.Mixfile do
       {:decimal, "~> 1.1"},
 
       {:credo, "~> 0.4", only: :dev},
-      {:dialyze, "~> 0.2.0", only: :dev},
-      {:earmark, "1.0.3", only: :dev},
-        # v1.1 introduces a deprecation warning that causes a lot of console
-        # noise when used with current as-of-this-writing version of exdoc (0.14.5)
+      {:dialyxir, "~> 0.5.1", only: :dev, runtime: false},
+      {:earmark, "~> 1.2", only: :dev},
       {:excoveralls, "~> 0.6", only: :test},
-      {:ex_doc, "~> 0.14.5", only: :dev},
+      {:ex_doc, "~> 0.18", only: :dev},
       {:inch_ex, "~> 0.5", only: :dev},
 
       {:excheck, "~> 0.5", only: :test},