Util\ObjectDeclarations: add findExtendedInterfaceNames() method#31

jrfnl merged 1 commit intodevelopPHPCSStandards/PHPCSUtils:developfrom

feature/new-objectdecl-findextendedinterfacenames-methodPHPCSStandards/PHPCSUtils:feature/new-objectdecl-findextendedinterfacenames-methodCopy head branch name to clipboard