clarify hidden option in readme (ruby-grape#593)

* clarify hidden option in readme

* update changelog

* add both ways to hide an endpoint

Author: thogg4

CHANGELOG.md

@@ -13,6 +13,7 @@
 * [#580](https://github.com/ruby-grape/grape-swagger/pull/580): Issue #578: fixes duplicated path params - [@LeFnord](https://github.com/LeFnord).
 * [#585](https://github.com/ruby-grape/grape-swagger/pull/585): Issue #584: do not mutate route.path - [@LeFnord](https://github.com/LeFnord).
 * [#586](https://github.com/ruby-grape/grape-swagger/pull/586): Issue #587: Parameters delimited by dash cause exception - [@risa](https://github.com/risa).
+* [#593](https://github.com/ruby-grape/grape-swagger/pull/593): Clarify hidden option in readme - [@thogg4](https://github.com/thogg4).
 
 * Your contribution here.
 

README.md

@@ -444,6 +444,12 @@ You can hide an endpoint by adding ```hidden: true``` in the description of the
 desc 'Hide this endpoint', hidden: true
 ```
 
+Or by adding ```hidden: true``` on the verb method of the endpoint, such as `get`, `post` and `put`:
+
+```ruby
+get '/kittens', hidden: true do
+```
+
 Endpoints can be conditionally hidden by providing a callable object such as a lambda which evaluates to the desired
 state: