apiRef: apiRef has been removed from the library. If you were using, just use the standard react “ref” if you need to get access to the class internals. (41c2c149)
Chip:
- Refactor to reduce the complexity, implementation, and event handling of Chips #354 (eb62bcac)
- Refactor to reduce the complexity, implementation, and event handling of Chips #354 (69139821)

Contributing: Updating contributing docs with a bit more info fixes #359 (73b34da8)
Slider: Adding known slider issue to documentation fixes #367 (a9d9f0fc)
ThemeProvider: Fixes empty onError property in example dropdown. closes #363 (714be619)

Switch: Corrects issue with controlled Switch using Safari fixes #374 (8dd7525b)
SelectIcon: Circumventing foundation to allow release due to MDC bug (e1c8fb6c)
MDC:
- Corrects and updates imports throughout components to match MDCs new export path. #354 (b81bdf14)
- Corrects and updates imports throughout components to match MDCs new export path. #354 (b6438b44)
Radio:
- removes deprecated adapter call, adds missing ripple #354 (405180e9)
- removes deprecated adapter call, adds missing ripple #354 (d53bb0da)

Dependencies: Move all 3rd party deps to base (d163492b)
Select:
- The Select component now uses the foundation / adapter pattern and includes an enhanced variant. A small caveat is the Select will no longer appear to show a value when no value or defaultValue is given. If you were relying on this behavior before, just pass defaultValue or value. #354 (ef5a104e)
- The Select component now uses the foundation / adapter pattern and includes an enhanced variant. A small caveat is the Select will no longer appear to show a value when no value or defaultValue is given. If you were relying on this behavior before, just pass defaultValue or value. #354 (11de8e1f)