Include `clojure.edn`

```
ClojureScript 1.10.758
cljs.user=> (require '[clojure.edn :as edn])
Execution error (ExceptionInfo) at (<cljs repl>:1).
No such namespace: cljs.edn, could not locate cljs/edn.cljs, cljs/edn.cljc, or JavaScript source providing "cljs.edn"
```