v2.4.0

Features

• add progress bar to QueryJob.to_dataframe and to_arrow (#352) (dc78edd)
• allow routine references (#378) (f9480dc)

Bug Fixes

• dbapi: allow rows to be fetched from scripts (#387) (b899ad1), closes #377

Performance Improvements

• avoid extra API calls from to_dataframe if all rows are cached (#384) (c52b317)
• cache first page of jobs.getQueryResults rows (#374) (86f6a51)
• use getQueryResults from DB-API (#375) (30de15f)

Dependencies

• expand pyarrow dependencies to include version 2 (#368) (cd9febd)