Bug with styled types

• The issue is present in the latest release.
• I have searched the issues of this repository and believe that this is not a duplicate.

Steps to Reproduce 🕹

When we use Custom props for styled function when get the error:

interface StyledButtonProps {
  type: string;
}
const StyledButton = styled(
  ({ type, ...other }: StyledButtonProps & ButtonProps) => <Button {...other} />
)({
  color: props => (props.type === "test" ? "red" : "green"),
  display: "block"
});

My sandbox https://codesandbox.io/s/hopeful-tesla-e9fut

Tech	Version
Material-UI	v4.9.2
React	16.12.0
Browser	Chrome 80
TypeScript	3.7.5
etc.

[mbrookes]

Adding @eps1lon who is 100% more skilled in this area than me. (I suspect that this should be ∞, give or take, but I’m not a big proponent of percentages > 100! 😆)

[kodermax]

@michelalbers Thanks a lot. Could you please add these examples to the documentation?