Update releases/2020.md

Author: superstructor

docs/releases/2020.md

@@ -8,6 +8,8 @@
 
 ## Unreleased
 
+## 1.1.0 (2020-08-24)
+
 #### Added
 
 - Add `:fx` effect handler. See [updated API docs](https://github.com/day8/re-frame/blob/master/docs/api-builtin-effects.md#ordering).