versions up

See #16, release log:

• b03a3af by @yegor256: #15 badge
• 597a204 by @yegor256: #15 son
• 8ff65d5 by @yegor256: #15 no windows
• 84acd72 by @yegor256: #15 bundle update
• 5e2840c by @yegor256: #15 no ruby version
• a7bed25 by @yegor256: #15 back
• e161cbf by @yegor256: #15 codecov
• f2bf388 by @yegor256: #15 badge
• ca633c5 by @yegor256: #15 ping
• dcbaa28 by @yegor256: #15 ping
• bdca29a by @yegor256: #15 versions up

Released by Rultor 1.70.6, see build log