phpcs & php-compatibility

[adrienrn]

Integrate this into the dotfiles:

$ cat ~/.config/composer/composer.json 
{
    "require": {
        "squizlabs/php_codesniffer": "*",
        "wimg/php-compatibility": "*"
    }
}

Commands for installing:

composer global require "squizlabs/php_codesniffer=*"
composer global require "wimg/php-compatibility=*"
cp -R ~/.config/composer/vendor/wimg/php-compatibility ~/.config/composer/vendor/squizlabs/php_codesniffer/CodeSniffer/Standards/PHPCompatibility

Copy is preferred to install until this issue is resolved :)