HTTPS instead of HTTP

See #23, release log:

• 4c96908 by @yegor256: #23 site off
• 18e5369 by @yegor256: #23 site first
• 04ade47 by @yegor256: #23 rultor
• 74b99ad by @yegor256: #23 badges
• c03a5e4 by @yegor256: #23 badge
• d974281 by @yegor256: #23 fixed
• 444b1fc by @yegor256: #23 https
• 5985b10 by @yegor256: fixed versions for rultor
• d395182 by @yegor256: xcop and est fixed version in ...
• 2fe3c22 by @yegor256: pdd fixed version in Travis
• 00c03e3 by @yegor256: Ruby 2.6.0 in Travis
• ddde952 by @yegor256: elegantobjects.org HTTPS
• d37a06e by @yegor256: Sixnines.io HTTPS
• a21ace2 by @yegor256: IntelliJ badge changed
• 4ef3720 by @yegor256: .github templates
• f440ab1 by @yegor256: 0pdd config
• d437076 by @yegor256: travis cfg
• 02eb039 by @yegor256: TEAM.md removed
• 8da0f16 by @yegor256: zerocracy badge
• 2584875 by @yegor256: 0pdd config update, notificati...
• and 6 more...

Released by Rultor 1.68.6, see build log