bd7e8b5ef9
update `pulldown-cmark` to `0.9.3` This PR updates `pulldown-cmark` to version `0.9.3`, which does two main things: * Pulls in https://github.com/raphlinus/pulldown-cmark/pull/643 to fix https://github.com/rust-lang/rust/issues/111117 * Allows parsing strikethrough with single tildes, e.g. `~foo~` -> ~foo~. This matches the [GFM spec](https://github.github.com/gfm/#strikethrough-extension-). Full changelog: https://github.com/raphlinus/pulldown-cmark/pull/646