Add 5.5.0alpha4
Add 5.5.0alpha4

gerardroche/php-build,rogeriopradoj/php-build,circleci/php-build,0livier/php-build,stof/php-build,hnw/php-build,hirak/php-build,stof/php-build,php-build/php-build,michael-berlin/php-build