README.md in strong_json-2.0.0 vs README.md in strong_json-2.1.0

@@ -115,10 +115,11 @@
 ```
 
 ### Base types
 
 * `number` The value must be an instance of `Numeric`
+* `integer` The value must be an instance of `Integer`
 * `string` The value must be an instance of `String`
 * `boolean` The value must be `true` or `false`
 * `numeric` The value must be an instance of `Numeric` or a string which represents a number
 * `any` Any value except `nil` is accepted
 * `symbol` The value must be an instance of `String` or `Symbol`; returns the result ot `#to_sym`
@@ -130,9 +131,10 @@
 ### Shortcuts
 
 There are some alias for `optional(base)`, where base is base types, as the following:
 
 * `number?`
+* `integer?`
 * `string?`
 * `boolean?`
 * `numeric?`
 * `symbol?`
 * `literal?(lit)`