Use composer installation from Travis box
Use composer installation from Travis box

Related to https://github.com/Behat/Mink/issues/413

jordi12100/Mink,Chekote/Mink,talib570/Mink,Behat/Mink,talib570/Mink,handrus/Mink,stof/Mink,jordi12100/Mink,aik099/Mink,jhedstrom/Mink,Chekote/Mink,jhedstrom/Mink,minkphp/Mink,minkphp/Mink