PDO `FETCH_COLUMN` and `fetchColumn` implemented
PDO `FETCH_COLUMN` and `fetchColumn` implemented

fixes https://github.com/peachpiecompiler/peachpie/issues/956

iolevel/peachpie-concept,iolevel/peachpie-concept,peachpiecompiler/peachpie,peachpiecompiler/peachpie,peachpiecompiler/peachpie,iolevel/peachpie-concept