Bump libxmljs from 0.19.7 to 0.19.8 (#7)

Bumps [libxmljs](https://github.com/libxmljs/libxmljs) from 0.19.7 to 0.19.8.
- [Release notes](https://github.com/libxmljs/libxmljs/releases)
- [Commits](libxmljs/libxmljs@v0.19.7...v0.19.8)

---
updated-dependencies:
- dependency-name: libxmljs
  dependency-type: direct:production
...

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