Remove final from Container class
Remove final from Container class

slimphp/Slim,juliangut/Slim,akrabat/Slim,foxyantho/Slim,AndrewCarterUK/Slim,iinux/Slim,iinux/Slim,dopesong/Slim,JoeBengalen/Slim,iinux/Slim,Sam-Burns/Slim,feryardiant/slim,mnapoli/Slim,RealSelf/Slim