Prepare changelog for release (#204)

Author: tkilias

doc/changes/changes_0.18.0.md

@@ -1,22 +1,22 @@
-# Script-Languages-Container-Tool 0.18.0, released t.b.d
+# Script-Languages-Container-Tool 0.18.0, released 2023-06-27
 
-Code name: t.b.d
+Code name: Fixes and improvements.
 
 ## Summary 
 
-t.b.d
+This release updated the integration-test-docker-environment to version 1.7.1, added options for configurin logging and fixed the database setup reuse.
 
 ## Features / Enhancements
 
- - #196: Added logging to API and CLI
+ - #196: Added logging options to API and CLI
 
 ## Refactorings
 
  - #201: Updated to integration-test-docker-environment 1.7.1
 
 ## Bug Fixes
 
-N/A
+ - #200: Fixed reuse database setup
 
 ## Security