Document that type may be an array.

Author: tmpfs

README.md

@@ -339,7 +339,7 @@ See the [system schema](https://github.com/freeformsystems/async-validate/blob/m
 
 ##### Type Identifier
 
-* `type <string|function>`: Type identifier or constructor function.
+* `type <string|function|array>`: Type identifier, constructor function or list of types.
 
 The `type` property indicates the type of rule to use, a type corresponds to a plugin function and the plugin should have been loaded.
 

doc/readme/guide.md

@@ -216,7 +216,7 @@ See the [system schema](/system.js).
 
 ##### Type Identifier
 
-* `type <string|function>`: Type identifier or constructor function.
+* `type <string|function|array>`: Type identifier, constructor function or list of types.
 
 The `type` property indicates the type of rule to use, a type corresponds to a plugin function and the plugin should have been loaded.
 

system.js

@@ -16,7 +16,7 @@ var schema = {
     required: {type: 'boolean'},
     test: {type: 'function'},
     type: {
-      type: ['string', 'function'],
+      type: ['string', 'function', 'array'],
       required: true
     },
     values: {type: ['object', 'array']},