Comrak-py

* Add C FFI, allowing Comrak to be used from other languages. (171, Garen
Torikian)
* Fix line wrapping in CommonMark output. (228, Edward Loveall)
* Add option to specify character used for unordered list bullets in
CommonMark output. (229, Edward Loveall)

* Fix Windows build.

* Support compiling for WASM. (222, Ben Wishoshavich)
* Replace deprecated twoway dependency. (224)

* SECURITY: Bump regex to 1.5.5. (221, Dependabot)
* Drop unneeded YAML dependency from Syntect. (199, Chris Wong)
* Match newline handling in code inlines to upstream, and improve test failure
reporting. (210, Michael Anderson)
* Make all node value fields public. (216, Evan Schwartz)
* Line break handling adjustments. (214, Michael Anderson)
* Disable control characters in link definitions. (219, Michael Anderson)

* Only load syntax and theme sets once, on Syntect plugin instantiation. (197)
* Match syntax highlighting language names more loosely. (198)

* Add pluggable syntax highlighting, and default implementation with syntect.
(Daniel Simon, 194)