Support Last 3 version of ES on Travis
Support Last 3 version of ES on Travis

FriendsOfOuro/geteventstore-php-core,dbellettini/php-eventstore-client,tahoelimited/php-eventstore-client,alesblaznik/php-eventstore-client,dbellettini/php-eventstore-client,alesblaznik/php-eventstore-client,FriendsOfOuro/geteventstore-php-core,dbellettini/php-eventstore-client,tahoelimited/php-eventstore-client