Elixir 1.11 Compiler Warning

[greg-rychlewski]

When compiling this library using Elixir v 1.11 you get the following warning:

warning: Ecto.Changeset.validate_required/2 defined in application :ecto is used by the current application but the current application does not depend on :ecto. To fix this, you must do one of:
  1. If :ecto is part of Erlang/Elixir, you must include it under :extra_applications inside "def application" in your mix.exs
  2. If :ecto is a dependency, make sure it is listed under "def deps" in your mix.exs
  3. In case you don't want to add a requirement to :ecto, you may optionally skip this warning by adding [xref: [exclude: [Ecto.Changeset]]] to your "def project" in mix.exs
  lib/params.ex:145: Params.changeset/2

This can be solved by changing

def application do
    [applications: [:logger]]
  end

to

def application do
    [extra_applications: [:logger]]
  end

in mix.exs. Please see here for more info: https://hexdocs.pm/mix/1.11.4/Mix.Tasks.Compile.App.html

I will submit a pull request to fix this.