ports-mgmt/pkg: release 1.20.0

Changes:
- update libucl to latest version
- update sqlite to latest version
- remove support for pkg_* tools backward compatibility
- add and autoremove command now respects provides/requires and shlibs provides/requires
- improve SRV and HTTP mirroring: reducing the number of round trips
- replace bundled libfetch with a stripped down bundled libcurl (only used for http(s))
- new COMPRESSION_FORMAT configuration entry in pkg.conf
- periodic script: Use locale-agnostic (ISO 8601)
- Add support for openssl3