- Restore the state of the connection if `Cursor.stream()` is terminated
  prematurely (:ticket:`#382`).
- Fix regression introduced in 3.1 with different named tuples mangling rules
  for non-ascii attribute names (:ticket:`#386`).
- Fix handling of queries with escaped percent signs (``%%``) in `ClientCursor`
  (:ticket:`#399`).
- Fix possible duplicated BEGIN statements emitted in pipeline mode
  (:ticket:`#401`).