README.md in sinatra-param-1.2.0

- old
+ new

@@ -31,10 +31,11 @@
   get '/search' do
     param :q,           String, required: true
     param :categories,  Array
     param :sort,        String, default: "title"
     param :order,       String, in: ["ASC", "DESC"], transform: :upcase, default: "ASC"
+    param :price,       String, format: "[<\=>]\s*\$\d+"
 
     {...}.to_json
   end
 end
 ```
@@ -57,9 +58,10 @@
 - `required`
 - `blank`
 - `is`
 - `in`, `within`, `range`
 - `min` / `max`
+- `format`
 
 ### Defaults and Transformations
 
 Passing a `default` option will provide a default value for a parameter if none is passed.  A `default` can defined as either a default or as a `Proc`:
 