timezone problem

[oslet]

env:
sqlalchemy-clickhouse 0.1.5.post0
superset 0.28.1

problem:
When I query the time field, the time is 8 hours behind. clickhouse timezone is Asia/Shanghai
using select now() in superset

but use clickhouse-client query select now() is right

Could you add a connection parameter? such as connect_args "time_zone": "Asia/Shanghai"

[vavrusa]

#52