0.18

See #798, release log:

• be80eb7 by @krzyk: #916 threaded rules validation
• 98d4052 by @krzyk: #901 allow protected methods i...
• 9eda09b by @krzyk: #800 usign qulice 0.17.4
• 6a34013 by @krzyk: #794 added min maven version

Released by Rultor 1.67.4, see build log