Filter hoc in a specified period

See #25, release log:

• 82df17e by @yegor256: #25 rultor config
• c627b6e by @yegor256: #24 #25 polished
• 40d3f39 by @rultor: Merge branch '__rultor'
• f70dc56 by @yegor256: #25 rultor
• 6cceb9c by @yegor256: #25 rultor cfg
• b7a7951 by @KellyGithubID: Update hoc.gemspec
• e8b5566 by @KellyGithubID: Update hoc.gemspec
• 392e324: fix offenses of RuboCop
• 39a5725: filter hoc in a specified peri...
• 8a54a07 by @yegor256: ruby version up to 2.6.0 for T...
• 30fead1 by @yegor256: Up to 2019, Happy New Year!
• 6da103c by @yegor256: elegantobjects.org HTTPS
• 2165907 by @yegor256: Location of home repo changed
• fcaa56c by @yegor256: badge
• f0213b1 by @yegor256: rdoc up
• 7893de9 by @yegor256: rubocop up
• d97f739 by @yegor256: badges
• 746c7e6 by @yegor256: badges
• 24849b3 by @yegor256: how to

Released by Rultor 1.68.5, see build log