v3.0 - PHP 8 compatiblity and package updates

chore: Update packages and php

PHP7.3 compatibility

v2.1.0

--enh Update to PHP7.3 + gitignore

Twig 2, php7 compatibility

v2.0.0

--fix Twig2 compatibility

SRG Release version

v1.6.1

Merge branch 'srggroup'

SRG Release version

v1.6.0

Changing composer.json