- update to 3.2.1:
  * Fix packaging metadata breaking [c], [binary] dependencies
  * Add support for integer, floating point, boolean NumPy scalar
    types (ticket #332).
  * Add timeout and stop_after parameters to Connection.notifies()
  * Allow dumpers to return None, to be converted to NULL (ticket
  * Add Raw query cursors to execute queries using placeholders in
    PostgreSQL format ($1, $2…) (tickets #560, #839).
  * Add capabilities object to inspect the libpq capabilities
  * Add scalar_row to return scalar values from a query
  * Add cancel_safe() for encrypted and non-blocking cancellation when
    using libpq v17. Use such method internally to implement
    KeyboardInterrupt and copy termination
  * The context parameter of sql objects as_string() and as_bytes()
    methods is now optional
  * Add set_autocommit() on sync connections, and similar transaction
    control methods available on the async connections.
  * Add a size parameter to stream() to enable results retrieval in
    chunks instead of row-by-row
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