#136 - PHP 8.4 compatibility

[krzysztofrewak]

Not all PHP 8.4 features are working. For example, this is a sample code from PHP website (https://www.php.net/releases/8.4/en.php) and it cracks Fixer:

class Locale
{
    public string $languageCode;

    public string $countryCode
    {
        set (string $countryCode) {
            $this->countryCode = strtoupper($countryCode);
        }
    }

    public string $combinedCode
    {
        get => \sprintf("%s_%s", $this->languageCode, $this->countryCode);
        set (string $value) {
            [$this->languageCode, $this->countryCode] = explode('_', $value, 2);
        }
    }

    public function __construct(string $languageCode, string $countryCode)
    {
        $this->languageCode = $languageCode;
        $this->countryCode = $countryCode;
    }
}

$brazilianPortuguese = new Locale('pt', 'br');
var_dump($brazilianPortuguese->countryCode); // BR
var_dump($brazilianPortuguese->combinedCode); // pt_BR

So for now I used simpler code to be sure that some of PHP 8.4 features works:

class PhpVersion
{
    public private(set) string $version = '8.4';

    public function increment(): void
    {
        [$major, $minor] = explode('.', $this->version);
        $minor++;
        $this->version = "{$major}.{$minor}";
    }
}

I also removed PHP 8.2 compatibility.