Changes

Update hical61-hical to version 2.5.0.

Upstream release: https://github.com/Hical61/Hical/releases/tag/v2.5.0

Port changes

• Updated version to 2.5.0 in vcpkg.json
• Updated SHA512 in portfile.cmake
• Added database feature with boost-charconv and boost-mysql dependencies
• Added vcpkg_check_features() to forward the database feature option to CMake

Checklist

• Changes comply with the maintainer guide.
• SHA512s are updated for each updated download.
• The "supports" clause reflects platforms that may be fixed by this new version, or no changes were necessary.
• Any fixed CI baseline and CI feature baseline entries are removed from that file, or no entries needed to be changed.
• All patch files in the port are applied and succeed.
• The version database is fixed by rerunning ./vcpkg x-add-version --all and committing the result.
• Exactly one version is added in each modified versions file.