README.md in strong_json-1.0.1 vs README.md in strong_json-1.1.0

@@ -84,9 +84,14 @@
 ### array(type)
 
 * The value must be an array
 * All elements in the array must be value of given `type`
 
+### hash(type)
+
+* The value must be an object
+* All values in the object must be value of given `type`
+
 ### optional(type)
 
 * The value can be `nil` (or not contained in an object)
 * If an value exists, it must be of given `type`