0.18

See #798, release log:

• 97605b4 by @krzyk: #877 fix quality issues
• 9e97c38 by @krzyk: #877 updated tests added rules...
• fe71001 by @krzyk: #877 test for forbiding Files....
• 9df81cd by @rultor: Merge branch '__rultor'
• 0ae8296 by @amihaiemil: length()
• 6de586d by @amihaiemil: year up
• 78df18a by @amihaiemil: year up
• f8e8334 by @krzyk: #889 dummy pdd
• f268db2 by @krzyk: #889 dummy pdd
• 04be11b by @krzyk: #889 trying to fix 0pdd/pdd
• 945483d by @krzyk: #850 added file and separate t...
• 7c181d5 by @krzyk: #850 adding test for diamond u...
• 479cc1a by @krzyk: #823 prohibit tags and fix tes...
• e12f99d by @krzyk: #823 remove author and version...
• c3ad4c4 by @krzyk: #863 getting rid of abstract n...
• 52487af by @krzyk: #822 merging master
• 7f914da by @krzyk: Merge branch 'master' into 822

Released by Rultor 1.67.2, see build log