Update version in README.md (#27)

ALLEN WANG · doomspork · commit ead34e6a0bae · 2016-09-21T21:04:16.000-06:00
diff --git a/README.md b/README.md
@@ -13,7 +13,7 @@
 
 ## Usage
 
-  1. Add `{:phoenix_slime, "~> 0.6.0"}` to your deps in `mix.exs`.
+  1. Add `{:phoenix_slime, "~> 0.7.0"}` to your deps in `mix.exs`.
   2. Add the following your Phoenix `config/config.exs`:
 
 ```elixir
