Update dependencies

Author: garyb

README.md

@@ -2,12 +2,16 @@
 
 ## Module Data.Unfoldable
 
-### Type Classes
+#### `Unfoldable`
 
-    class Unfoldable t where
-      unfoldr :: forall a b. (b -> Maybe (Tuple a b)) -> b -> t a
+``` purescript
+class Unfoldable t where
+  unfoldr :: forall a b. (b -> Maybe (Tuple a b)) -> b -> t a
+```
 
 
-### Type Class Instances
+#### `unfoldableArray`
 
-    instance unfoldableArray :: Unfoldable Prim.Array
+``` purescript
+instance unfoldableArray :: Unfoldable Prim.Array
+```

bower.json

@@ -18,8 +18,8 @@
     "package.json"
   ],
   "dependencies": {
-    "purescript-arrays": "^0.3.0",
-    "purescript-maybe": "^0.2.1",
-    "purescript-tuples": "^0.2.3"
+    "purescript-arrays": "~0.3.0",
+    "purescript-maybe": "~0.2.1",
+    "purescript-tuples": "~0.3.0"
   }
 }