…imated.ScrollView` `onScroll` props (& similar)

According to RN docs (and experience) it's handy to be able to use `Animated.event` to map `onScroll` event directly to an `Animated.Value`.
Currently the bindings make this impossible as if you try to do this

```reason
open ReactNative;

let styles = Style.(StyleSheet.create({"container": style(~flex=1., ())}));

type renderArgs = {
  scrollYAnimatedValue: Animated.Value.t,
  scrollViewRef:
    React.Ref.t(Js.Nullable.t(ReactNative.Animated.ScrollView.element)),
};

[@react.component]
let make =
    (
      ~style as s=?,
      ~contentContainerStyle=?,
      ~children: renderArgs => React.element,
    ) => {
  let scrollViewRef = React.useRef(Js.Nullable.null);
  let (scrollYAnimatedValue, _setScrollYAnimatedValue) =
    React.useState(() => Animated.Value.create(0.));

  <Animated.ScrollView
    ref=scrollViewRef
    style=Style.(arrayOption([|Some(styles##container), s|]))
    ?contentContainerStyle
    scrollEventThrottle=1
    onScroll={Animated.event(
      [|{
          "nativeEvent": {
            "contentOffset": {
              "y": scrollYAnimatedValue,
            },
          },
        }|],
      {"useNativeDriver": true},
    )}
    showsVerticalScrollIndicator=false
    showsHorizontalScrollIndicator=false>
    {children({scrollYAnimatedValue, scrollViewRef})}
  </Animated.ScrollView>;
};
```

You will get an error like this

```
  We've found a bug for you!
......./AnimatedScrollView.re 21:14-30:6

  19 ┆ ?contentContainerStyle
  20 ┆ scrollEventThrottle=1
  21 ┆ onScroll={Animated.event(
  22 ┆   [|{
   . ┆ ...
  29 ┆   {"useNativeDriver": true},
  30 ┆ )}
  31 ┆ showsVerticalScrollIndicator=false
  32 ┆ showsHorizontalScrollIndicator=false>

  This has type:
    ReactNative.Animated.animatedEvent (defined as
      ReactNative.Animated.animatedEvent)
  But somewhere wanted:
    ReactNative.Event.scrollEvent => unit
```

Which is valid!

This change make this valid (tested in the app I currently work on).