databases/pecl-redis: Update 5.3.7 → 6.1.0, take maintainership

Original author of the patch: Mark <mark@elpescador.nl>

Changelogs:
https://pecl.php.net/package-changelog.php?package=redis&release=6.1.0

While here replace PORTVERSION with DISTVERSION.

PR: 285154 282573
Approved by: Daniel Ylitalo <daniel@blodan.se> (maintainer)