Update withRheostat.tsx

[AE0011]

Add rest chartprops Incase if we want to pass some extra props to chart e.g. yAccessor={({item}) => item.value} for a custom data

[DrChai]

since it's written in Typescript now, that would also need to add more types of its props. After all, it is just another HOC, perhaps a proper way is to write a custom component and then wrap it with withRheostat instead.