update the thing to use

README.md

@@ -73,7 +73,7 @@ There are only 4 methods:
 ```js
 http01
 	.set({
-		altname: 'foo.example.co.uk',
+		identifier: { value: 'foo.example.co.uk' },
 		token: 'xxxx'
 		keyAuthorization: 'xxxx.yyyy'
 	})