[PATCH] Add rubygems updater.

[Ben Woodcroft]

Phew, you almost beat me to the first patch of the year there Pjotr..

It seems there's 30 packages to be updated, out of the 107 in ruby.scm. 
Going through each of these individually seems a little tedious, can we 
do them in bulk somehow or do they have to be committed individually? 
Building and testing all packages that require these packages would be a 
start - is there any way to list all dependent packages?

gnu/packages/ruby.scm:2807:13: ruby-cutest would be upgraded from 1.2.2 
to 1.2.3
gnu/packages/ruby.scm:333:13: ruby-rspec-mocks would be upgraded from 
3.2.1 to 3.4.0
gnu/packages/ruby.scm:1527:13: ruby-daemons would be upgraded from 1.2.2 
to 1.2.3
gnu/packages/ruby.scm:1581:13: ruby-slop would be upgraded from 4.1.0 to 
4.2.1
gnu/packages/ruby.scm:2707:13: ruby-cucumber-core would be upgraded from 
1.3.0 to 1.3.1
gnu/packages/ruby.scm:1486:13: ruby-minitest-sprint would be upgraded 
from 1.1.0 to 1.1.1
gnu/packages/ruby.scm:2221:13: ruby-rb-fsevent would be upgraded from 
0.9.6 to 0.9.7
gnu/packages/ruby.scm:1339:13: ruby-redcarpet would be upgraded from 
3.3.3 to 3.3.4
gnu/packages/ruby.scm:1427:13: ruby-net-ssh would be upgraded from 3.0.1 
to 3.0.2
gnu/packages/ruby.scm:2241:13: ruby-listen would be upgraded from 3.0.3 
to 3.0.5
gnu/packages/ruby.scm:1124:13: ruby-gettext would be upgraded from 3.1.7 
to 3.2.0
gnu/packages/ruby.scm:1765:13: ruby-pry would be upgraded from 0.10.1 to 
0.10.3
gnu/packages/ruby.scm:2467:13: ruby-pg would be upgraded from 0.18.2 to 
0.18.4
gnu/packages/ruby.scm:967:13: ruby-useragent would be upgraded from 
0.13.3 to 0.16.3
gnu/packages/ruby.scm:299:13: ruby-rspec-expectations would be upgraded 
from 3.2.1 to 3.4.0
gnu/packages/ruby.scm:1629:13: ruby-arel would be upgraded from 6.0.3 to 
7.0.0
gnu/packages/ruby.scm:797:13: ruby-notiffany would be upgraded from 
0.0.7 to 0.0.8
gnu/packages/ruby.scm:2684:13: ruby-gherkin3 would be upgraded from 
3.1.1 to 3.1.2
gnu/packages/ruby.scm:162:13: ruby-hoe would be upgraded from 3.13.1 to 
3.14.2
gnu/packages/ruby.scm:452:13: ruby-rjb would be upgraded from 1.5.3 to 1.5.4
gnu/packages/ruby.scm:367:13: ruby-rspec would be upgraded from 3.2.0 to 
3.4.0
gnu/packages/ruby.scm:940:13: ruby-simplecov would be upgraded from 
0.10.0 to 0.11.1
gnu/packages/ruby.scm:1448:13: ruby-minitest would be upgraded from 
5.7.0 to 5.8.3
gnu/packages/ruby.scm:1964:13: ruby-tins would be upgraded from 1.7.0 to 
1.8.1
gnu/packages/ruby.scm:2263:13: ruby-activesupport would be upgraded from 
4.2.4 to 4.2.5
gnu/packages/ruby.scm:1689:13: ruby-nokogiri would be upgraded from 
1.6.6.2 to 1.6.7.1
gnu/packages/ruby.scm:407:13: bundler would be upgraded from 1.10.6 to 
1.11.2
gnu/packages/ruby.scm:2405:13: ruby-ox would be upgraded from 2.2.1 to 2.2.3
gnu/packages/ruby.scm:246:13: ruby-rspec-core would be upgraded from 
3.2.3 to 3.4.1
gnu/packages/ruby.scm:2493:13: ruby-byebug would be upgraded from 6.0.2 
to 8.2.1


Thanks in advance for the review.
ben

0001-import-gem-Add-updater.patch
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