Add a missing changelog entry

Author: bbatsov

CHANGELOG.md

@@ -29,6 +29,7 @@ within the scope of your current Emacs session.
 * [#1820](https://github.com/clojure-emacs/cider/issues/1820): Don't try to display eldoc in EDN buffers.
 * [#1823](https://github.com/clojure-emacs/cider/issues/1823): Fix column location metadata set by interactive evaluation.
 * [#1859](https://github.com/clojure-emacs/cider/issues/1859): Make nREPL message log much faster. `nrepl-dict-max-message-size` custom variable was removed.
+* [#1613](https://github.com/clojure-emacs/cider/issues/1859): Check whether a before/after refresh function is resolvable.
 
 
 ## 0.13.0 (2016-07-25)