Revert "Depend on stable versions (in preparation for PHPUnit 4.7 release)"
Revert "Depend on stable versions (in preparation for PHPUnit 4.7 release)"

This reverts commit 16bd00de93adc62edff94a3dc881ceeb48ce59f2.

duncan3dc/phpunit,imshibaji/phpunit,s001dxp/phpunit,ezzatron/phpunit,chrisbjr/phpunit,eelf/phpunit,simohammedhttp/phpunit,kyale/phpunit,malkusch/phpunit,serbanghita/phpunit,darol100/phpunit,m157y/phpunit,CarsonF/phpunit,masarakki/phpunit,FireWalkerX/phpunit,stof/phpunit,bradgrohs/phpunit,zhaoyan158567/phpunit,Ma27/phpunit,beealone/phpunit,asgrim/phpunit,luomor/phpunit,HappyRay/phpunit,SunDrop/phpunit,tronsha/phpunit,ya7lelkom/phpunit,Firehed/phpunit,didiwuliu/phpunit,abachi/phpunit,nonconforme/phpunit,dshafik/phpunit,WebSeed/phpunit,MartinhoOmura/phpunit,lcp0578/phpunit,sebastianbergmann/phpunit,9040044/phpunit,Lance0312/phpunit,nelson6e65/phpunit,Shaked/phpunit,MajorCaiger/phpunit,OndraM/phpunit,matheusgomes17/phpunit,DonaldKellett/phpunit