prepare release

Author: dbu

Diff for: CHANGELOG.md

@@ -1,7 +1,8 @@
 # Change Log
 
-## (unreleased)
+## 1.19.0 - 2023-06-19
 
+- [#249](https://github.com/php-http/discovery/pull/249) - Have composer plugin correctly install Symfony http client when nothing explicitly requires psr 18 resp. httplug.
 - [#241](https://github.com/php-http/discovery/pull/241) - Support discovering PSR-17 factories of `httpsoft/http-message` package
 
 ## 1.18.1 - 2023-05-17