improve changelog

Author: dcsg

CHANGELOG.md

@@ -4,6 +4,22 @@ All notable changes to `Immutable Collections for PHP` will be documented in thi
 
 Updates should follow the [Keep a CHANGELOG](http://keepachangelog.com/) principles.
 
+## NEXT - YYYY-MM-DD
+
+### Added
+- Nothing
+
+### Deprecated
+- Nothing
+
+### Fixed
+- Nothing
+
+### Removed
+- Nothing
+
+### Security
+- Nothing
 
 ## 1.1.1 - 2019-01-27
 
@@ -18,7 +34,6 @@ Updates should follow the [Keep a CHANGELOG](http://keepachangelog.com/) princip
 ### Added
 - declared strict types in all PHP files.
 
-
 ## 1.0.0 - 2019-01-26 [Initial Release]
 
 ### Added