Changelog for libpq-devel-10.5-1.el8.i686.rpm :

* Wed Aug 08 2018 Pavel Raiskup - 10.5-1- update to 10.5 per release notes: https://www.postgresql.org/docs/10/static/release-10-5.html
* Fri Jul 13 2018 Pavel Raiskup - 10.4-2- ABI/symbol versioning
* Thu Jul 12 2018 Pavel Raiskup - 10.4-1- rebase to the latest upstream release
* Fri Apr 13 2018 Pavel Raiskup - 10.3-1- initial release, packaging inspired by postgresql.spec- provide postgresql-devel to avoid fixing all the client packages