build(deps): bump posthtml-parser from 0.6.0 to 0.12.0

Bumps [posthtml-parser](https://github.com/posthtml/posthtml-parser) from 0.6.0 to 0.12.0.
- [Release notes](https://github.com/posthtml/posthtml-parser/releases)
- [Changelog](https://github.com/posthtml/posthtml-parser/blob/master/changelog.md)
- [Commits](posthtml/posthtml-parser@v0.6.0...v0.12.0)

---
updated-dependencies:
- dependency-name: posthtml-parser
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>