Luhn

TODO: Add description

Installation

If available in Hex, the package can be installed as:

1. Add luhn to your list of dependencies in mix.exs:

```elixir
def deps do
  [{:luhn, "~> 0.1.0"}]
end
```

2. Ensure luhn is started before your application:

```elixir
def application do
  [applications: [:luhn]]
end
```