Changes between 5.16.0 and 5.17.0.RC1

This is a minor release with bug fixes, usability improvements, and dependency upgrades. It is compatible with 5.16.x. All users of the 5.x.x series are encouraged to test it.

Thanks to Nikita Nefedov (@nikita2206) for his contribution.

Remove hard dependency on Jackson in OAuth 2 support

GitHub PR: #969

NPE in AbstractMetricsCollector when channel limit is exceeded

GitHub issue: #944

Report publish failures for the closed channel as well

GitHub PR: #943

Remove dependency on java.sql.Timestamp

GitHub PR: #878

Bump dependencies

GitHub issue: #848