Mdit-py-plugins

- ✨ NEW: Port `admon` plugin by KyleKing ([53](https://github.com/executablebooks/mdit-py-plugins/pull/53))
- ✨ NEW: Add span parsing to inline attributes plugin by chrisjsewell ([55](https://github.com/executablebooks/mdit-py-plugins/pull/55))
- 🐛 FIX: Task list item marker can be followed by any GFM whitespace by hukkin in ([42](https://github.com/executablebooks/mdit-py-plugins/pull/42))

**Full Changelog**: [v0.3.1...v0.4.0](https://github.com/executablebooks/mdit-py-plugins/compare/v0.3.1...v0.4.0)

- ⬆️ UPGRADE: Drop Python 3.6, support Python 3.10
- 🐛 FIX: Parsing when newline is between footnote ID and first paragraph
- 🐛 FIX: Anchor ids in separate renders no longer affect each other.
- ✨ NEW: Add `attrs_plugin`
- 🔧 MAINTAIN: Use flit PEP 621 package build

- ⬆️ UPGRADE: Compatible with markdown-it-py `v2`.
- ✨ NEW: Add field list plugin, Based on the [restructuredtext syntax](https://docutils.sourceforge.io/docs/ref/rst/restructuredtext.html#field-lists)
- ♻️ REFACTOR: dollarmath plugin, `math_block_eqno` -> `math_block_label` token
- ♻️ REFACTOR: Remove AttrDict usage from texmath
- 👌 IMPROVE: Default HTML rendering for dollarmath and amsmath plugins
- 👌 IMPROVE: Add render options for dollarmath and amsmath plugins
- 👌 IMPROVE: MyST parsing of target blocks (allow whitespace) and roles (allow for new lines)

🐛 FIX: `wordcount` update of minutes

- ⬆️ UPDATE: markdown-it-py~=1.0
- ✨ NEW: Add `wordcount_plugin`
- 👌 IMPROVE: `dollarmath`: Allow inline double-dollar
- 👌 IMPROVE: `myst_blocks`: Parse multiline comments
- 👌 IMPROVE: Replace use of `env` as an `AttrDict`
- 🐛 FIX: `front_matter`: don't duplicate content storage in `Token.meta`

👌 IMPROVE: Remove direct use of `Token.attrs`