Published on 2020-07-21.

* refactor(ios/engine): update detection now based upon packages (#3362)
* refactor(ios/engine): package download notifications (#3363)
* refactor(ios/engine): package-based resource updates, cloud resource migration (#3372)
* fix(ios/engine): engine tier enum, proper detection (#3373)
* refactor(ios/engine): Centralized Keyman domain definitions (#3381)

Minor fixes and performance improvements