Introduction of PHP CS Fixer has broken PHP 7.4 support

[mikestreety]

Deployer Version

v7.5.6

Target OS

Alpine

Which PHP version are you using?

PHP 7.4

Content of deploy.php or deploy.yaml

N/A

Steps to reproduce

1. Use PHP 7.4
2. Install >= 7.5.6

Running dep in a PHP 7.4 environment throws the following error:

Parse error: syntax error, unexpected ')', expecting variable (T_VARIABLE) in phar:///var/www/html/vendor/deployer/deployer/bin/dep/vendor/ringcentral/psr7/src/functions.php on line 355

This is because the php-cs-fixer appears to have linted the code to PHP 8+, including the files included in the vendor folder

44b3a55

Highlighted in the IDE when inspecting the PHAR contents in the file vendor/ringcentral/psr7/src/functions.php.

Although it breaks on this, I suspect other changes in this linted commit will also cause to break

[mikestreety]

I can't quite replicate it locally to verify this works (as there seem to be loads of differences in the vendor folder when I install the dev dependencies),

However I believe adding the following rule to .php-cs-fixer.dist.php will solve the issue

'trailing_comma_in_multiline' => [
            'after_heredoc' => true, 
            'elements' => ['arguments', 'array_destructuring', 'arrays']
]

The rules inherit from CSR2.0 which have 'match', 'parameters' included in the elements, which is for PHP >= 8.0

https://cs.symfony.com/doc/rules/control_structure/trailing_comma_in_multiline.html

I understand this works on master as that has a minimum PHP version of 8.2, however version 7 of deployer still supports PHP 7.3+.