Features
- Add total counts to the sync progress report.
[4503](https://pulp.plan.io/issues/4503)
- Greatly speed up publishing of a repository.
[4591](https://pulp.plan.io/issues/4591)
- Add ability to copy content between repositories, content type(s) can be specified.
[4716](https://pulp.plan.io/issues/4716)
- Renamed Errata/Update content to Advisory to better match the terminology of the RPM/DNF ecosystem.
[4902](https://pulp.plan.io/issues/4902)
- Python bindings are now published nightly and with each release as
[pulp-rpm-client](https://pypi.org/project/pulp-rpm-client/). Also Ruby bindings are published
similarly to rubygems.org as [pulp_rpm_client](https://rubygems.org/gems/pulp_rpm_client).
[4960](https://pulp.plan.io/issues/4960)
- Override the Remote's serializer to allow policy='on_demand' and policy='streamed'.
[5065](https://pulp.plan.io/issues/5065)
Bugfixes
- Require relative_path at the content unit creation time.
[4835](https://pulp.plan.io/issues/4835)
- Fix migraitons failure by making models compatible with MariaDB.
[4909](https://pulp.plan.io/issues/4909)
- Fix unique index length issue for MariaDB.
[4916](https://pulp.plan.io/issues/4916)
Improved Documentation
- Switch to using [towncrier](https://github.com/hawkowl/towncrier) for better release notes.
[4875](https://pulp.plan.io/issues/4875)
- Add a docs page about the Python and Ruby bindings.
[4960](https://pulp.plan.io/issues/4960)
Misc
- [4117](https://pulp.plan.io/issues/4117), [#4567](https://pulp.plan.io/issues/4567), [#4574](https://pulp.plan.io/issues/4574), [#5064](https://pulp.plan.io/issues/5064)