What's Changed
- Fix up reference to as_serde attribute in the book by @KodrAus in #315
- Add an example of additional props on span guards by @KodrAus in #316
- Add book section on additional span props by @KodrAus in #317
- Prepare for 1.14.0 release by @KodrAus in #318
Full Changelog: v1.13.1...v1.14.0
