Bump version

Author: railsmechanic

README.md

@@ -15,7 +15,7 @@ The package can be installed as Hex package:
 
   ```elixir
   def deps do
-    [{:nanoid, "~> 2.0.3"}]
+    [{:nanoid, "~> 2.0.4"}]
   end
   ```
 

mix.exs

@@ -4,7 +4,7 @@ defmodule Nanoid.Mixfile do
   def project do
     [
       app: :nanoid,
-      version: "2.0.3",
+      version: "2.0.4",
       elixir: "~> 1.4",
       start_permanent: Mix.env() == :prod,
       description: description(),