message: feat(lock): update className of lock button based on interactivity state
diff: @@ -34,7 +34,7 @@ export default ({ style, className }: ControlProps) => {
  }}
  >
  <div
  - className="react-flow__controls-button react-flow__controls-lock"
  + className={`react-flow__controls-button react-flow__controls-${isInteractive? 'unlocked' : 'locked' }`}
  onClick={() => setInteractive(!isInteractive)}
  >
  { isInteractive ? <UnlockIcon /> : <LockIcon /> }
  