RPA Worker now uses the 8.9 client, and now several classes and configuration properties are now either deprecated, or deprecated marked for removal.
The aliases mean that configurations will continue to work with some small changes.
After 1.3.0 is released all the configuration properties (including docs, samples, etc) should be updated so that only current properties are in use (no aliases), as well as moving away from any deprecated classes that are currently in use (some of which will be removed in 8.10)