Fastcore

New Features
- add `EventTimer` ([263](https://github.com/fastai/fastcore/issues/263))
- Store kwargs in `store_attr ([262](https://github.com/fastai/fastcore/issues/262))
- add `truncstr` ([261](https://github.com/fastai/fastcore/issues/261))
- add `sparkline` ([260](https://github.com/fastai/fastcore/issues/260))
- add `autostart` for generators ([249](https://github.com/fastai/fastcore/issues/249))
- dynamic fastcore.script help width ([247](https://github.com/fastai/fastcore/issues/247))
- optional override to `risinstance` to support both types and str in the same function ([191](https://github.com/fastai/fastcore/pull/191)), thanks to [kessido](https://github.com/kessido)

Bugs Squashed

- delegates doesn't pull the `__init__` of a class ([217](https://github.com/fastai/fastcore/issues/217))
- `test_eq` incorrect for pandas `DataFrame` ([188](https://github.com/fastai/fastcore/pull/188)), thanks to [kessido](https://github.com/kessido)

New Features

- enum support for `call_parse` ([245](https://github.com/fastai/fastcore/issues/245))
- Added obj2dict ([244](https://github.com/fastai/fastcore/issues/244))
- `return_headers` param for `urlsend` and `urlread` ([242](https://github.com/fastai/fastcore/issues/242))
- add common Chrome headers ([241](https://github.com/fastai/fastcore/issues/241))
- add `utc2local` and `local2utc` ([239](https://github.com/fastai/fastcore/issues/239))
- add `Path.read_json` ([238](https://github.com/fastai/fastcore/issues/238))

Bugs Squashed

- `*args` not handled correctly in process/thread pools ([246](https://github.com/fastai/fastcore/issues/246))

Bugs Squashed

- regression in urlopen header user-agent not set ([237](https://github.com/fastai/fastcore/issues/237))
- `loads` incompatible with Python 3.9 ([236](https://github.com/fastai/fastcore/issues/236))
- Documentation search not working ([235](https://github.com/fastai/fastcore/issues/235))

New Features

- split `parallel` and `net` modules out of `xtras` ([234](https://github.com/fastai/fastcore/issues/234))
- New HTTP Exceptions hierarchy for each status code, used by `url*` functions
- add `Request.summary` and `debug` paramaeter to `urlsend` ([233](https://github.com/fastai/fastcore/issues/233))
- Add `ImportEnum`, `StrEnum`, and `str_enum` ([232](https://github.com/fastai/fastcore/issues/232))
- handle encoded data in `urlrequest` ([231](https://github.com/fastai/fastcore/issues/231))

New Features

- use `__slots__` in `store_attr` if exists ([226](https://github.com/fastai/fastcore/issues/226))
- add `urlrequest` ([225](https://github.com/fastai/fastcore/issues/225))
- add `loads` and `urlsend` ([224](https://github.com/fastai/fastcore/issues/224))
- add `PartialFormatter` and `partial_format` ([223](https://github.com/fastai/fastcore/issues/223))
- add `stringfmt_names` ([222](https://github.com/fastai/fastcore/issues/222))

New Features

- rename `negate_func` to `not_` for consistency with other curried ops ([221](https://github.com/fastai/fastcore/issues/221))
- Support empty content for `urljson` ([219](https://github.com/fastai/fastcore/issues/219))
- move `patch` and `patch_to` to `fastcore.basics`, and avoid clobbering existing symbols when patching ([214](https://github.com/fastai/fastcore/issues/214))