update php dependency to ">=5.4.20"
update php dependency to ">=5.4.20"

cedricalfonsi/php-webdriver,OndraM/php-webdriver,OndraM/php-webdriver,passbolt/passbolt_selenium,OndraM/php-webdriver,OndraM/php-webdriver,passbolt/passbolt_selenium,cedricalfonsi/php-webdriver