Bump cdav-library from `73c676c` to `e42bd0b`

Bumps [cdav-library](https://github.com/nextcloud/cdav-library) from `73c676c` to `e42bd0b`.
- [Release notes](https://github.com/nextcloud/cdav-library/releases)
- [Commits](https://github.com/nextcloud/cdav-library/compare/73c676cf03c88db816d0df32563b67bb75be4715...e42bd0b80740432dc39b54a24e7120ed465611a8

)

---
updated-dependencies:
- dependency-name: cdav-library
  dependency-type: direct:production
...

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