Update composer.json
Update composer.json

Fixed broken composer requirement
Sam-Burns/Slim,feryardiant/slim,mnapoli/Slim,samsonasik/Slim,akrabat/Slim,somjit2514/basic,foxyantho/Slim,JoeBengalen/Slim,iinux/Slim,iinux/Slim,dopesong/Slim,juliangut/Slim,jaapverloop/Slim,designermonkey/Slim,opengeek/Slim,AndrewCarterUK/Slim,slimphp/Slim,RealSelf/Slim,iinux/Slim