According to https://www.opendnssec.org/download/ version 1.4.14 was released on 2017-04-28. It is the current LTS release.
Please note that even this version will go EOL in about 1 month: https://www.opendnssec.org/2019/10/opendnssec-1-4-end-of-life-upgrading-and-testing-versions/ But maybe this version bump is easier to achieve than bug #632570, which would buy us some time getting version 2.1 to work in Gentoo.
(In reply to Dennis Schridde from comment #0)
> Please note that even this version will go EOL in about 1 month:
correction: 3 months
This was explicitly to request a bump in the 1.4 release line, which is an LTS branch and thus the only version available in Gentoo that is still being maintained upstream (1.3 and 2.0 are non-LTS branches and thus superseded by 1.4 and 2.1). The version bump to 2.1.6 is already being tracked in bug #632570.
The assumption was that a bump in a patch-level version (1.4.x) can be done quicker and with less risk than a bump in the minor version (2.x), since the latter would bring new features that have to be tested. If this assumption is wrong and the bump to 2.1 is only a few days or weeks away, please close this bug as a duplicate of bug #632570.