Fix inserting / updating a boolean value, PostgreSQL does not accept an integer value 0 or 1
Fix inserting / updating a boolean value, PostgreSQL does not accept an integer value 0 or 1

matthijs/sqlpp11-connector-postgresql,matthijs/sqlpp11-connector-postgresql,cszawisza/sqlpp11-connector-postgresql,cszawisza/sqlpp11-connector-postgresql,cszawisza/sqlpp11-connector-postgresql,matthijs/sqlpp11-connector-postgresql