Features
- add RPC priority support (#324) (51533b8)
- add support for low-cost instances (#313) (44aa7cc)
- spanner: add processing_units to Instance resource (#364) (113505c)
- update query stats samples (#373) (c1ee8c2)
Bug Fixes
- db_api: use sqlparse to split DDL statements (#372) (ed9e124)
- db_api: classify batched DDL statements (#360) (b8b24e1)
- deps: add packaging requirement (#368) (89c126c)