PHP Deprecated warnings

[ahmeddabak]

I am trying to use this library in my project running php8.1. I keep getting a deprecation warning from the HighchartOption class.

PHP Deprecated:  Return type of Ghunti\HighchartsPHP\HighchartOption::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/vendor/ghunti/highcharts-php/src/HighchartOption.php on line 111

PHP Deprecated:  Return type of Ghunti\HighchartsPHP\HighchartOption::offsetGet($offset) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/vendor/ghunti/highcharts-php/src/HighchartOption.php on line 121

PHP Deprecated:  Return type of Ghunti\HighchartsPHP\HighchartOption::offsetSet($offset, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/vendor/ghunti/highcharts-php/src/HighchartOption.php on line 99

PHP Deprecated:  Return type of Ghunti\HighchartsPHP\HighchartOption::offsetUnset($offset) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/vendor/ghunti/highcharts-php/src/HighchartOption.php on line 116