Merge pull request #37 from lambda/patch-1

Bump version number in README.md
diff --git a/README.md b/README.md
index 0326e5f..b812c4b 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@
 
 ```toml
 [dependencies]
-rand = "0.2"
+rand = "0.3"
 ```
 
 and this to your crate root: