message: fix StyledRadioGroup React key warning
diff: @@ -41,9 +41,8 @@ function StyledRadioGroup<T extends string>({name, definitions, value, className
  };
  return <React.Fragment>
  - {definitions.map(d => <React.Fragment>
  + {definitions.map(d => <React.Fragment key={d.value}>
  <StyledRadioButton
  - key={d.value}
  className={classNames(className, d.className)}
  onChange={_onChange}
  checked={d.value === value}
  