The getdns package for EPEL (and Fedora too) is currently sitting at version 1.4.2. Upstream has source code available (at time of writing) for version 1.5.1.
getdns-1.5.2-2.fc30 has been submitted as an update to Fedora 30. https://bodhi.fedoraproject.org/updates/FEDORA-2019-bd36822ace
getdns-1.5.2-2.fc29 has been submitted as an update to Fedora 29. https://bodhi.fedoraproject.org/updates/FEDORA-2019-d21b1c784c
getdns-1.5.2-2.el7 has been submitted as an update to Fedora EPEL 7. https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2019-3d6a915488
getdns-1.5.2-2.el7 has been pushed to the Fedora EPEL 7 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2019-3d6a915488
getdns-1.5.2-2.fc30 has been pushed to the Fedora 30 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2019-bd36822ace
getdns-1.5.2-2.fc29 has been pushed to the Fedora 29 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2019-d21b1c784c
getdns-1.5.2-2.fc30 has been pushed to the Fedora 30 stable repository. If problems still persist, please make note of it in this bug report.
getdns-1.5.2-2.fc29 has been pushed to the Fedora 29 stable repository. If problems still persist, please make note of it in this bug report.
getdns-1.5.2-2.el7 has been pushed to the Fedora EPEL 7 stable repository. If problems still persist, please make note of it in this bug report.