Release 0.19

See #167, release log:

• 2981f17 by @victornoel: Merge pull request #173 from v...
• d12361f by @victornoel: Use alpine 3.10 for xcop to wo...
• d97cfe6 by @victornoel: Fix rultor config
• 3e16875 by @rultor: Merge branch '__rultor'
• d9fad1e by @llorllale: chore: update build status bad...
• 310fd52 by @victornoel: (#162) fix todo
• c9aba90 by @victornoel: (#162) bump dependencies and u...
• a40df7d by @rultor: Merge branch '__rultor'
• 8b14557 by @andreoss: (#136) Add puzzle
• c7bc081 by @victornoel: (#135) - MatcherEnvelope is a ...
• 7ebaceb by @andreoss: Merge remote-tracking branch '...
• 4daa27a by @rultor: Merge branch '__rultor'
• e62e068 by @andreoss: (#67) Add puzzle
• 1305122 by @andreoss: (#67) Remove puzzle
• 581c98e by @andreoss: (#67) Fix tests
• c99ed73 by @andreoss: (#67) Call describeMismatch ...
• 7427724 by @rultor: Merge branch '__rultor'
• ccc6aa3 by @victornoel: Merge pull request #158 from v...
• 70846f9 by @victornoel: For yegor256/cactoos#1404, vic...
• 787bdfa by @andreoss: (#93) Indentation fix
• and 31 more...

Released by Rultor 1.69.1, see build log