Fix: inclusion of base test files in composer package (#380)

Closes #379

Fix: Correct type-hint for parameters sfConfigCache (#370)

Hotfix: Add type checking for deserialized data in sfParameterHolder …

…and sfNamespacedParameterHolder (CVE-2024-28861)

Set min versions of swiftmailer to 5.4.13 and 6.2.5 and updated swift…

…mailer submodule (#331)

* Update min versions of swiftmailer to v5.4.13 or v6.2.5
* Update swiftmailer code on submodule to v5.4.13

Backported display_errors-handling to sf1

PHP 8.3 deprecated errors fixed (#320)

Add(changelog) Add v1.5.15 release date to Changelog file

Merge pull request #266 from Tybaze/compat_php8.1

Ensure compatibility with PHP 8.0 & 8.1

1.5.13

Merge pull request #225 from FriendsOfSymfony1/fix/following-218

Fix tests count following #218