Bump version to v0.2.0

Author: sheharyarn

README.md

@@ -32,7 +32,7 @@ Add `safeurl` to your project dependencies in `mix.exs`:
 
 ```elixir
 def deps do
-  [{:safeurl, "~> 0.1.0"}]
+  [{:safeurl, "~> 0.2.0"}]
 end
 ```
 

mix.exs

@@ -4,7 +4,7 @@ defmodule SafeURL.MixProject do
 
   @app     :safeurl
   @name    "SafeURL"
-  @version "0.1.0"
+  @version "0.2.0"
   @github  "https://github.com/slab/safeurl-elixir"