- Added `builtins.any()` and `builtins.all()` (#44)
- `builtins.next()` takes an optional `default` parameter (#40, #41)
- `asyncio.gather()` now handles cancellation (#64)
- Better exception handling in `itertools.tee()` (#47)
- Removed dependency on typing_extensions for Python 3.8 and newer (#49)
- Improved documentation and formatting