message: Fix typo in README.md code
  It seems like "xy" in the destructuring of the return value of `useSpring()` should be separate variables `x` and `y`.
diff: @@ -30,7 +30,7 @@ import { useSpring, animated } from 'react-spring'
  import { useDrag } from 'react-use-gesture'
  function PullRelease() {
  - const [{ xy }, set] = useSpring(() => ({ x: 0, y: 0 }))
  + const [{ x, y }, set] = useSpring(() => ({ x: 0, y: 0 }))
  // 1. Define the gesture
  const bind = useDrag(({ down, movement: [mx, my] }) => set({ x: down ? mx : 0, y: down ? y : 0 }))
  