Add #[\ReturnTypeWillChange] attribute for PHP 8.x compatibility.#339

Minishlink merged 2 commits intoweb-push-libs:masterweb-push-libs/web-push-php:masterfrom

xenforo-ltd:php81-v6.0.5xenforo-ltd/web-push-php:php81-v6.0.5Copy head branch name to clipboard