[packaging] bump rql dependency to 0.29 (closes #2410042) Needed for add_eid_restriction with 4 args, usage of which was introduced in changeset aed065b97f12 (refactor entity fetch_rql method to use a RQL syntax tree instead of RQL strings)

if repo.system_source.dbdriver == 'postgres':
    sql('ALTER TABLE appears ADD COLUMN weight float')
    sql('UPDATE appears SET weight=1.0 ')