Exception in thread "main" java.lang.BootstrapMethodError: java.lang.NoClassDefFoundError: org/cactoos/Scalar

See #1339, release log:

• 9c99ad6 by @yegor256: #1339 test fix
• 1d1cd51 by @yegor256: md fixes again
• fee17cc by @yegor256: md fixes
• 8b3abe5 by @yegor256: md check
• 2e1e483 by @yegor256: Merge pull request #1343 from ...
• a2d7fe3 by @yegor256: Merge pull request #1315 from ...
• 4009d69 by @yegor256: Merge pull request #1336 from ...
• 0bbc430 by @yegor256: #1339 up fix
• 0ea9f30 by @renovate[bot]: chore(deps): update dependency...
• 8b1d39e by @yegor256: Merge pull request #1338 from ...
• 573c065 by @yegor256: Merge pull request #1341 from ...
• 9eb3383 by @yegor256: Merge pull request #1340 from ...
• 915aa66 by @yegor256: new version in README
• bc63d34 by @yegor256: #1339 jar with deps
• 861e3a3 by @renovate[bot]: fix(deps): update dependency o...
• 58e4a61 by @yegor256: more ctors
• c9a2ccc by @yegor256: polished
• c2f5697 by @yegor256: simplified
• b5d441f by @yegor256: doc typos
• 0d0ce73 by @renovate[bot]: chore(deps): update dependency...
• and 4 more...

Released by Rultor 2.0-SNAPSHOT, see build log