[3.x] Update test environment for PHP 7.2 to compatible PHPUnit version#334

WyriHaximus wants to merge 1 commit intoreactphp:3.xreactphp/socket:3.xfrom

WyriHaximus-labs:3.x-update-test-environment-for-PHP-7.2WyriHaximus-labs/socket:3.x-update-test-environment-for-PHP-7.2Copy head branch name to clipboard