Also:
* Refactored some composed components into one inclusive HOC,
called `withUpdateButtonAttributes`.
* The HOC `withTransformSingleSelectToMultipleSelect` allows for the wrong
type to be passed to its wrapped component: if a single element is
passed, that is wrapped into an array.
This didn't play well with TypeScript which obviously complains about
the wrong type being passed to the component.
So we now allow for arrays to be passed as props and ignored by the HOC
* Add support for overlay color and duotone
* Add support for custom inner padding
* Wrap all block experimental features in `isFeaturePluginBuild`
* Fix resizable container min height
The container now resizes if, e.g., padding is increased, and can't be resized down
with the handle to a height lower than it's minimum size determined by content and
padding box.
* Fix resizable handle not being fully visible
Previously, `overflow: hidden` was needed because the height constraint and
padding could push the content out of the container. Now this should not be
possible.
* Add an option to the block to decide how is the image fitted to the container
Albert Juhé Lluveras
Lucio Giannotta