v0.4.26

The changes from #807 we merged for 0.4.25 unfortunately restricted parsing in a way that was incompatible with earlier 0.4.x releases. We reverted this in #1113. A small amount of other changes were merged since.

• Update README (#1111, thanks to @pitdicker)
• Revert backport of #807 (#1113, thanks to @pitdicker)
• Update to 2021 edition (#1109, thanks to @tottoto)
• Fix DurationRound panics from issue #1010 (#1093, thanks to @pitdicker)
• tests: date path consolidate (branch 0.4.x) (#1090, thanks to @jtmoon79)
• Parse tests nanosecond bare dot (branch 0.4.x) (#1098, thanks to @jtmoon79)
• yamllint cleanup lint.yml test.yml (#1102, thanks to @jtmoon79)
• Remove num-iter dependency (#1107, thanks to @tottoto)

Thanks on behalf of the chrono team (@djc and @esheppa) to all contributors!