[flow] Update StackViewConfig to match recent changes (#5067)

packages/react-navigation/flow/react-navigation.js

@@ -407,9 +407,15 @@ declare module 'react-navigation' {
     headerLayoutPreset?: 'left' | 'center',
     headerBackTitleVisible?: boolean,
     cardStyle?: ViewStyleProp,
-    transitionConfig?: () => TransitionConfig,
+    transitionConfig?: (
+      transitionProps: NavigationTransitionProps,
+      prevTransitionProps: ?NavigationTransitionProps,
+      isModal: boolean
+    ) => TransitionConfig,
     onTransitionStart?: () => void,
     onTransitionEnd?: () => void,
+    transparentCard?: boolean,
+    disableKeyboardHandling?: boolean,
   |};
 
   declare export type StackNavigatorConfig = {|