Remove 5.5 from travis until it has pecl support
Remove 5.5 from travis until it has pecl support

ericariyanto/react,sachintaware/react,ericariyanto/react,dagopoot/react,cesarmarinhorj/react,nemurici/react,FireWalkerX/react,krageon/react,nemurici/react,sachintaware/react,cystbear/react,cesarmarinhorj/react,reactphp/react,ympons/react,dagopoot/react,cystbear/react,naroga/react,FireWalkerX/react,naroga/react,ympons/react,krageon/react