swiftmailer/swiftmailer — pull request #452 by stof (2014-04-05 12:28:16+00:00)
Title: Added testing on PHP 5.2 and 5.6 on Travis

According to @GrahamCampbell in #450, Travis supports PHP 5.2, so this will avoid breaking compatibility with it by mistake (once you drop support for 5.2, it can be disabled)