After using RxRust in Ribir for a while, I think it's time to release 1.0. Before that, we need to complete the following tasks:

• rename ObservableExt to Observable, and Observable to ObservableImpl, so we can more easily describe the type of observable.
• merge SubscribeItem and BoxIt into Observable.
• The Subject needn't use a chamber to avoid the borrow conflict. If the user wants to emit items in its subscribe method he can use delay to avoid the borrow conflict.
• update the document for the 1.0 version.

I plan to start work on this project following the release of Ribir 0.1.0, which is expected to happen in the next month. If you're interested in contributing, please don't hesitate to reach out.