Prepare for 1.17.0 release.
# Changelog
All notable changes to this project will be documented in this file.
-## 1.17.0 - Unreleased
+## 1.17.0 - 2021-08-21
- Add support for threaded abstract types. Threaded abstract types can easily be shared between threads.
- Deprecate the `thread` library. Use threaded channels and ev instead.
- Channels can now be marshalled.
