Fastcore

New Features

- add `hl_md()` ([557](https://github.com/fastai/fastcore/issues/557))
- bool value handling for `xt` ([556](https://github.com/fastai/fastcore/issues/556))
- Add py2pyi ([555](https://github.com/fastai/fastcore/issues/555))
- Add attr support to `nested_idx` ([554](https://github.com/fastai/fastcore/issues/554))

New Features

- add `fastcore.xml.highlight()` ([553](https://github.com/fastai/fastcore/issues/553))

New Features

- Do not add closing tags for void tag types ([551](https://github.com/fastai/fastcore/issues/551))
- Add tuple support to `to_xml`
- Add `start_proc()`

New Features

- Add `process` param to `threaded` ([550](https://github.com/fastai/fastcore/issues/550))
- Check for `__xt__` in `to_xml`

New Features

- Add `xml` module for XML and HTML generation ([549](https://github.com/fastai/fastcore/issues/549))
- Add `NotStr`, which behaves like a `str`, but is not an instance of one ([548](https://github.com/fastai/fastcore/issues/548))
- Add `NS`, a `SimpleNamespace` subclass that also adds `iter` and `dict` support ([547](https://github.com/fastai/fastcore/issues/547))

New Features

- Add deprecated python stdlib `imghdr` to fastcore, and add additional jpeg header ([546](https://github.com/fastai/fastcore/issues/546))
- Add additional numpydoc sections ([545](https://github.com/fastai/fastcore/pull/545)), thanks to [dsm-72](https://github.com/dsm-72)