Consistency of Java version

See #1872, release log:

• 26124e4 by @yegor256: Merge pull request #1876 from ...
• 0fd9f4f by @yegor256: Merge pull request #1875 from ...
• 6aa29e9 by @yegor256: #1872: Update Java version req...
• a3397b5 by @renovate[bot]: Update dependency org.pitest:p...
• e861201 by @mvanhorn: IterableOf.equals: also catch ...
• 13131d0 by @mvanhorn: #1859 Matched.next throws NoSu...
• 33d5d3f by @renovate[bot]: Update dependency org.sonarsou...
• 8eca896 by @renovate[bot]: Update crate-ci/typos action t...
• 5ac33f3 by @renovate[bot]: Update crate-ci/typos action t...
• 8594185 by @yegor256: Merge pull request #1868 from ...
• 49a00bc by @yegor256: Merge pull request #1869 from ...
• 3726eee by @renovate[bot]: Update codecov/codecov-action ...

Released by Rultor 2.0-SNAPSHOT, see build log