See documentation on RTD, especially the release notes. This release is a huge break to backwards compatibility, so we are going through a beta cycle before mainlining the release. Hot areas to test for:
- unexpected behavior when using nondefault units
- interactions of class instances with different units.
- Q polynomials
- errors where there shouldn't be any (i.e., internal bugs)
- unnecessary breaks (i.e. things that existed in the 0.16 API that are possible to implement as properties with warnings for 0.17 to ease the transition.)