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