See: https://www.ruby-lang.org/en/news/2019/01/30/ruby-2-6-1-released/
See: https://www.ruby-lang.org/en/news/2018/12/25/ruby-2-6-0-released/

New packages mirroring upstream gemification of ruby:
* ruby-bundler (new)
* ruby-e2mmap and ruby-ostruct (from ruby-misc)
* ruby-forwardable (from ruby-patterns)
* ruby-matrix and ruby-prime (from removed ruby-math)
* ruby-mutex_m, ruby-sync and ruby-thwait (from ruby-multithread)
* ruby-tracer (from ruby-debuglib)

Added ruby-dev for building extension inside openwrt (requires cc)

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

2.5.0 introduces many new features and performance improvements.
See: https://www.ruby-lang.org/en/news/2017/12/25/ruby-2-5-0-released/

Packaging changes:
* As date was promoted into a gem, ruby-datetime
  was splitted into ruby-date and ruby-time
* New packages for gemified stdlib files:
  - ruby-cmath (from ruby-math)
  - ruby-date (from ruby-datetime)
  - ruby-etc (from ruby-misc)
  - ruby-fcntl (from ruby-misc)
  - ruby-fileutils (from ruby-filelib)
  - ruby-ipaddr (from ruby-socket)
  - ruby-scanf (from ruby-misc)
  - ruby-stringio (from ruby-misc)
  - ruby-strscan (from ruby-misc)

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

This is a stable feature release.

Notable changes:

- Introduce hash table improvement (by Vladimir Makarov)
- Binding#irb: Start a REPL session similar to binding.pry
- Unify Fixnum and Bignum into Integer
- String supports Unicode case mappings
- Performance improvements
- Thread#report_on_exception and Thread.report_on_exception changes
- Thread deadlock detection now shows threads with their backtrace and dependency
- Support OpenSSL 1.1.0 (drop support for 0.9.7 or prior)
- ext/tk is now removed from stdlib Feature #8539
- XMLRPC is now removed from stdlib Feature #12160

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

ruby subpackages now are generated by a macro. This reduces the
Makefile size by half and the chance of errors.

No change in packages contents, install-size or dependencies, except
for some removed doc files.

Improved ruby_missingfiles and ruby_find_pkgsdeps script

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

ruby_find_pkgsdeps: look for file dependencies (checks
require and Encoding references) and extrapolate it to pkgs
deps. Also checks whether a dep is redundant or missing in pkgs.
Must run inside an OpenWRT with all ruby* pkgs installed.

ruby_missingfiles: list files in staging/target and from files
comparing side by side its contents. It helps to easly visualize
which file is not packaged in an ipk.

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