Support setting session TIMEZONE

[villisco]

Please add option to set the db sessions timezone (inside connection string maybe?).

Example:

SET TIME ZONE 'UTC'

TIMESTAMP WITH TIME ZONE (type: timestamptz) columns in postgres use the db session timezone for date conversion.

This is needed because INSERT'ing data on DST (Daylight Saving Time) period can have some strange timestamp converting behaviors.

[alejandrodnm]

Hey @villisco we don't have a lot of bandwidth right now to add new features, but we welcome PRs :)