[travis-ci] Fix composer install
[travis-ci] Fix composer install

Bug introduced in fa83f08a6e61896b594395f618f8ee1e4807005f

Maks3w/zend-http,netroby/zend-http,zendframework/zend-http,malinink/zend-http,asgrim/zend-http,weierophinney/zend-http