Bump version to 0.2

Author: Josh Price

README.md

@@ -20,7 +20,7 @@ First, add GraphQL to your `mix.exs` dependencies:
 
 ```elixir
 defp deps do
-  [{:graphql, "~> 0.1.2"}]
+  [{:graphql, "~> 0.2"}]
 end
 ```
 
@@ -92,6 +92,7 @@ This is a work in progress, right now here's what is done:
   - [x] Extract variable values
 - [x] Introspection
 - [WIP] Query validation
+- [ ] Directives
 
 ## Resources
 

mix.exs

@@ -1,7 +1,7 @@
 defmodule GraphQL.Mixfile do
   use Mix.Project
 
-  @version "0.1.2"
+  @version "0.2.0"
 
   @description "GraphQL Elixir implementation"
   @repo_url "https://github.com/graphql-elixir/graphql"