Update to 3.4.3

Changelog: https://github.com/phalcon/cphalcon/releases/tag/v3.4.3

• Add PHP 7.3 support
• Give Maintainership to Submitter [1]

PR: 236239
Reported by: Franco Fichtner <franco@opnsense.org>
Approved by: maintainer [1]
Sponsored by: Netzkommune GmbH