Upgrade Twig to support PHP 8.0/8.1

[gchtr]

Related:

• #2638
• #2580
• #2548

Issue

In order to make Timber 1 compatible with PHP 8 and 8.1, we need to upgrade Twig as well. Together with making Twig compatible with PHP 8, they also dropped support for PHP 7.1 in Twig 1.44.0.

Solution

We can make PHP 7.2.5 the minimum required PHP version for Timber. In the plugin, we can use the Requires PHP header to make sure that the plugins isn’t updated with any checks.

Impact

No support for PHP version < 7.2.

Usage Changes

None.

Considerations

Can’t think of any yet.

Testing

Testing is provided by @nlemoine in #2638.