bump version to 0.8

Author: mindreframer

README.md

@@ -28,7 +28,7 @@ iex> AtomicMap.convert(%{ "a" => [ %{"c" => 1}, %{"c" => 2}] }, safe: true]
   1. Add atomic_map to your list of dependencies in `mix.exs`:
 
         def deps do
-          [{:atomic_map, "~> 0.7"}]
+          [{:atomic_map, "~> 0.8"}]
         end
 
 ## Todo:

mix.exs

@@ -1,7 +1,7 @@
 defmodule AtomicMap.Mixfile do
   use Mix.Project
 
-  @version  "0.7.0"
+  @version  "0.8.0"
   def project do
     [app: :atomic_map,
      version: @version,