text: Title: animation_options in Graph has incorrect default value ("ease" instead of "easing")
  Body: The defaultProps for `animation_options` are `{ frame: { redraw: false, }, transition: { duration: 750, ease: 'cubic-in-out', }, }`, but `Plotly.animate` takes an "easing" argument, not "ease". 
  
  I don't see any warning in the console for this, so I don't think these arguments are being validated; I can put whatever I like in `animation_options` and never get warnings/errors.
  
  As an aside, it would be helpful if the `dash_core_components` [docs](https://dash.plotly.com/dash-core-components/graph) mentioned that `frame.duration` has to be set at least as long as `transition.duration`, or at least linked to [https://plotly.com/javascript/animations/](https://plotly.com/javascript/animations/), as it's not immediately clear that you can't just arbitrarily set `transition.duration` to higher values. In fact the default `frame.duration` is 500, so the 750 default value here is misleading (maybe just setting `frame.duration` to 750 in the default here would at least highlight to users that it needs to be set).