Update changelog

CHANGELOG.md

@@ -2,15 +2,15 @@
 
 All Notable changes to `monolog-slack` will be documented in this file see this [url](http://keepachangelog.com/)
 
-## [NEXT]
+## [v1.1.0] - 2018-11-12
 
 ### Changed
 - Added version PHP 7.3 to travis.
 - Require version 1.24 as minimum version of monolog. Unfortunately monolog introduced a BC on https://github.com/Seldaek/monolog/pull/808
 
 > BC Notice: If you are extending any of the Monolog's Formatters' normalize method, make sure you add the new $depth = 0 argument to your function signature to avoid strict PHP warnings. See #808 for more details.
 
-## [v1.0.0] - 2018-11-12
+## [v1.0.0] - 2018-09-16
 
 This is the first stable release. No change has been made since 0.3.