feat: expose animation related properties in context

src/utils/StackAnimationProgressContext.tsx

@@ -1,6 +1,6 @@
 import * as React from 'react';
 import Animated from 'react-native-reanimated';
 
-export default React.createContext<Animated.Value<number>>(
+export default React.createContext<Animated.Node<number>>(
   new Animated.Value(0)
 );

src/views/Stack/Card.tsx

@@ -913,7 +913,9 @@ export default class Card extends React.Component<Props> {
                     contentStyle,
                   ]}
                 >
-                  <StackAnimationProgressContext.Provider value={current}>
+                  <StackAnimationProgressContext.Provider
+                    value={next || current}
+                  >
                     <StackAnimationIsSwipingContext.Provider
                       value={this.isSwiping}
                     >