ruby: update to 3.0.0

ruby: update to 3.0.0

This release goal is performance, concurrency, and typing. See details
in https://www.ruby-lang.org/en/news/2020/12/25/ruby-3-0-0-released/

New subpackages (reflect of mostly complete upstream ruby gemification)
- ruby-abbrev (from ruby-misc)
- ruby-base64 (from ruby-misc)
- ruby-coverage (from ruby-misc)
- ruby-continuation (from ruby-misc)
- ruby-debug (from ruby-debuglib)
- ruby-english (from ruby-misc)
- ruby-expect (from ruby-misc)
- ruby-fiber (from ruby-misc)
- ruby-find (from ruby-filelib)
- ruby-io-nonblock (from ruby-multithread)
- ruby-io-wait (from ruby-multithread)
- ruby-monitor (from ruby-multithread)
- ruby-net-ftp (from ruby-net)
- ruby-net-http (from ruby-net)
- ruby-net-imap (from ruby-net)
- ruby-net-pop (from ruby-net)
- ruby-net-protocol (from ruby-net)
- ruby-objspace (from ruby-debuglib)
- ruby-open-uri (from ruby-net)
- ruby-pathname (from ruby-filelib)
- ruby-pp (from ruby-prettyprint)
- ruby-pty (from ruby-misc)
- ruby-rbs (NEW)
- ruby-resolv (from ruby-socket)
- ruby-resolv-replace (from ruby-socket)
- ruby-securerandom (from ruby-misc)
- ruby-set (from ruby-misc)
- ruby-shellwords (from ruby-misc)
- ruby-syslog (from ruby-logger)
- ruby-tempfile (from ruby-filelib)
- ruby-tmpdir (from ruby-filelib)
- ruby-tsort (from ruby-misc)
- ruby-typeprof (NEW)
- ruby-un (from ruby-mkmf)
- ruby-weakref (from ruby-misc)

Removed subpackages
- ruby-debuglib (split into ruby-debug,ruby-objspace)
- ruby-filelib (split into ruby-find,ruby-pathname,ruby-tempfile,ruby-tmpdir)
- ruby-misc (split into ruby-abbrev,ruby-base64,ruby-continuation,
    ruby-coverage,ruby-english,ruby-expect,ruby-fiber,ruby-securerandom,
    ruby-set,ruby-shellwords,ruby-tsort,ruby-weakref)
- ruby-multithread (split into ruby-io-nonblock,ruby-io-wait,ruby-monitor)
- ruby-net (split into ruby-net-ftp,ruby-net-http,ruby-net-imap,ruby-net-pop,
    ruby-net-protocol,ruby-open-uri)
- ruby-net-telnet (removed upstream)
- ruby-sdbm (removed upstream)
- ruby-webrick (removed upstream)
- ruby-xmlrpc (removed upstream)

Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>