Revert "Depend on stable versions (in preparation for PHPUnit 4.8 release)"
Revert "Depend on stable versions (in preparation for PHPUnit 4.8 release)"

This reverts commit 66a0a6c0724a0e8660a309b63aaaa42806f64c9e.

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