[travis-ci] Composer install --ignore-platform-reqs
[travis-ci] Composer install --ignore-platform-reqs

Remove platform constraint requirements when install. Tests already skip the execution if the required plafform requirement is not present

MadCat34/zend-view,bfolliot/zend-view,Maks3w/zend-view,bfolliot/zend-view,codeliner/zend-view,FabianKoestring/zend-view,codeliner/zend-view,ezimuel/zend-view,Maks3w/zend-view,MadCat34/zend-view,FabianKoestring/zend-view,ezimuel/zend-view,zendframework/zend-view,zendframework/zend-view