support deftype/defrecord special reader syntax

In Clojure, we can read a record with a special reader syntax with a piece of code like this:
(read-string "#user.Person{:firstname "Joe", :lastname "Smith", :age 37}")

In Clojurescript, the similar code with cljs.reader doesn't work:
(cljs.reader/read-string "#user.Person{:firstname "Joe", :lastname "Smith", :age 37}")

I causes an error:
No reader function for tag user.Person