release a PHP 7.1 and PHP 8.1 Twig version

[williamdes]

As said in by @fabpot (phpmyadmin/phpmyadmin#16746 (comment)) "we can probably re-add PHP 7.1 support for a "special" release."

Problem explained: phpmyadmin/phpmyadmin#16746 (comment)
PHP version drop: #3410

Here is the commit list that should be picked on a branch to be released before the PHP 7.2 version restriction. Other solution, remove the PHP version restriction, release and put it back.

Commit/PR/issues list (used https://github.com/twigphp/Twig/search?q=8.1&state=closed&type=issues):

• Add ReturnTypeWillChange to JsonSerializable implementation #3536
• Fix implicit float to int casts #3535
• [PHP 8.1] During inheritance of JsonSerializable: Uncaught Declaration of Twig\Markup::jsonSerialize() should be compatible with JsonSerializable::jsonSerialize(): mixed #3534
• PHP 8.1 - realpath(): Passing null to parameter #1 ($path) of type string is deprecated #3494
• Add explicit @return type next to #[ReturnTypeWillChange] #3554
• Fix code for PHP 8.1 #3505
• Twig2 PHP 8.1 beta compatibility #3552
• parts of this commit: 47201dc

Let me know what I can do.

This is the last step for us to provide a PHP 7.1 and 8.1 compatible version in a clean way. Else I will have to apply patches manually after composer install. Everyone would agree that it would be way less clean than a special release.

[fabpot]

Which branch do you need? 1.x, 2.x, or 3.x?

[williamdes]

Which branch do you need? 1.x, 2.x, or 3.x?

Seems like 3.x was never PHP 7.1 compatible: 70dc998

This is why we require Twig 2.9+ or 3.x at phpMyAdmin 5.1.x: https://github.com/phpmyadmin/phpmyadmin/blob/679eca275ae31d986c6caf0f6d16898b0e52ac9a/composer.json#L60

So that would be from 2.x