Log Message:
py-ipyparallel: updated to 8.2.0

8.2.0 is a small release, mostly of small bugfixes and improvements.

Changes:

`len(AsyncMapResult)` and progress ports now use the number of items in the map,
not the number of messages.

Enhancements:

- Show output prior to errors in `%%px`

Bugs fixed:

- Fix cases where engine id could be `-1` in tracebacks
- Add missing `pbs` to engine launcher entrypoints