Add Sticky decorator for Map

See #1863, release log:

• b82d416 by @yegor256: Merge branch 'master' of githu...
• 892d407 by @yegor256: Merge pull request #1828 from ...
• e54922e by @yegor256: Refactor object vs. static met...
• 3b48b49 by @yegor256: Merge pull request #1851 from ...
• c83c81a by @yegor256: #1851: Refactor variable names...
• c6f5826 by @yegor256: Merge pull request #1867 from ...
• 34ba43d by @yegor256: #1866: Add 'PMD.UnnecessaryLoc...
• 9a8f27b by @yegor256: #1866: Update Java versions an...
• df16234 by @yegor256: #1866: Remove unnecessary @sup...
• c6c47b7 by @yegor256: #1866: Refactor static method ...
• a41049c by @yegor256: #1866: Refactor exception hand...
• 7dc77c4 by @yegor256: #1866: Refactor ThreadsTest to...
• c1f456e by @yegor256: #1866: Refactor code to use tr...
• 4511094 by @yegor256: #1866: Refactor method paramet...
• a1d2bdc by @yegor256: #1866: inline single-use local...
• fa3a9e8 by @yegor256: #1866: Set release pre to fals...
• c9f5fc8 by @yegor256: Merge branch 'master' of githu...
• b0274c9 by @yegor256: Refactor time tracking logic i...
• eeb5fe0 by @yegor256: Refactor byte manipulation for...

Released by Rultor 2.0-SNAPSHOT, see build log