Update README.md

Updates the base64 example

README.md

@@ -7,7 +7,7 @@ Base62 non-sequential url-friendly UUID generator (RFC4122)
 
 ## Overview
 
-uuid-base62 makes it easy to generate short base62 (or any other base) UUIDs. The unencoded UUIDs are generated by [node-uuid](https://github.com/broofa/node-uuid) which follows [RFC4122](http://www.ietf.org/rfc/rfc4122.txt).
+uuid-base62 makes it easy to generate short base62 (or any other base) UUIDs. The unencoded UUIDs are generated by [node-uuid](https://github.com/broofa/node-uuid) which follows [RFC4122](http://www.ietf.org/rfc/rfc4122.txt). The encoded UUIDs are alphanumeric [0-9a-zA-Z] and always have a length of 22 chars.
 
 ## Instalation
 ```shell
@@ -30,11 +30,14 @@ var encoded = uuidBase62.encode('8fc60e7c-3b3c-48e9-a6a7-a5fe4f1fbc31');
 // -> 2fNwVYePN8WqqDFvVf7XMN
 ```
 
-That's it. node-base62 also supports other bases, example for base64:
+That's it. uuid-base62 also supports other bases, example for base64:
 ```javascript
-uuidBase62.customBase = new uuidBase62.b62("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_");
+uuidBase62.customBase = new uuidBase62.baseX("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_");
+var uuid = uuidBase62.v4();
 // -> 31LoSI_BVeQpXtwu_-GEbL
 ```
 
+For more examples check the [tests](https://github.com/dmarcelino/uuid-base62/blob/master/test/uuid-base62.test.js).
+
 ## License
 MIT