Merge pull request #84 from neo4j-php/add-release-date

Add release date to CHANGELOG

Author: marijnvanwezel

CHANGELOG.md

@@ -6,7 +6,7 @@ file. A changelog has been kept from version 5.0.0 onwards.
 The format is based on [Keep a Changelog], and this project adheres to
 [Semantic Versioning].
 
-## 5.0.0 - To be determined
+## 5.0.0 - 2022-01-09
 
 ### Added