Bump cdav-library from `0d5be94` to `c27587a`

Bumps [cdav-library](https://github.com/nextcloud/cdav-library) from `0d5be94` to `c27587a`.
- [Release notes](https://github.com/nextcloud/cdav-library/releases)
- [Commits](https://github.com/nextcloud/cdav-library/compare/0d5be948bbe5682ac350f8534c4459885e5eb25d...c27587a4fdb318d10ef329548d146755964e6672

)

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