[sqlite] SELECT CAST('' AS INTEGER) returns zero instead of null

hi, sql standard says to strip whitespace and then convert. "" coercing to zero instead of NULL strikes me as very odd.. thanks some code here- https://github.com/rstats-db/RSQLite/issues/127

[sqlite] i think this is a bug in sqlite? thanks

https://github.com/rstats-db/RSQLite/issues/125#event-488337588