• add tqdm.dask.TqdmCallback (#1079, #279 <- #278)
• add asyncio.gather() (#1136)
• add basic support for length_hint (#1068)
• add & update tests
• misc documentation updates (#1132)
  • update contributing guide
  • update URLs
  • bash completion: add missing --delay
• misc code tidy
  • add [notebook] extra (#1135)