Tighten dependency specifications for ex_doc and earmark.

Previous spec for ex_doc allowed upgrade to 0.14.5, which would be fine, but caused a failure in `mix deps.get` because specified version of earmark is too old.

But ... we can't upgrade to current earmark (1.1.1 as of this writing) because it deprecates a function that latest ex_doc uses. So we specify latest compatible version.

Author: scouten

mix.exs

@@ -25,8 +25,10 @@ defmodule Sqlitex.Mixfile do
 
       {:credo, "~> 0.4", only: :dev},
       {:dialyze, "~> 0.2.0", only: :dev},
-      {:earmark, "~> 0.2.1", only: :dev},
-      {:ex_doc, "~> 0.11", 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)
+      {:ex_doc, "~> 0.14.5", only: :dev},
       {:inch_ex, "~> 0.5", only: :dev},
 
       {:excheck, "~> 0.5", only: :test},