Спампаваць Libdigidocpp 4.5.0

We appreciate your feedback to www.id.ee.
- Add Container::extendContainerValidity for adding archive timestamps to eligible ASiC-E and ASiC-S/TST containers, or wrapping a container in timestamped ASiC-S when in-place extension is unavailable
(#658)
- Update libraries and platform support
(#722, #726, #749)
- Improve signature and container compatibility
(#615, #728, #729, #730, #735, #751, #752, #754, #756)
- Harden XML, ZIP, network, and file handling
(#731, #732, #734, #736, #738, #743)
- Other fixes, optimizations, and documentation updates
(#727, #733, #753, #755, #757)
Full Changelog: https://github.com/open-eid/libdigidocpp/compare/v4.4.0...v4.5.0