React Navigation: headerLayoutPreset && headerBackTitleVisible (#29833)

* Update types for stack navigator

https://reactnavigation.org/docs/en/stack-navigator.html

* unecessary `

* add tests?

* What type is this Ref

* commit a log

* define Ref Types in tests

* does not have any construct or call signatures | the methods causing this error arent even used

* All tests passing

* WIP

* add to test

* why do I need graphql-tools

* diff

* wip

* cleanup

* lol

* remove console.log

* remove ref Types

types/react-navigation/index.d.ts

@@ -25,6 +25,7 @@
 //                 Denis Frezzato <https://github.com/DenisFrezzato>
 //                 Mickael Wegerich <https://github.com/mickaelw>
 //                 Max Davidson <https://github.com/maxdavidson>
+//                 Lachlan Young <https://github.com/builtbyproxy>
 //                 Jason Killian <https://github.com/jkillian>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.8
@@ -374,7 +375,9 @@ export interface NavigationToggleDrawerAction {
 export interface NavigationStackViewConfig {
   mode?: 'card' | 'modal';
   headerMode?: HeaderMode;
+  headerBackTitleVisible?: boolean;
   headerTransitionPreset?: 'fade-in-place' | 'uikit';
+  headerLayoutPreset?: 'left' | 'center';
   cardStyle?: StyleProp<ViewStyle>;
   transitionConfig?: (
     transitionProps: NavigationTransitionProps,

types/react-navigation/react-navigation-tests.tsx

@@ -125,6 +125,7 @@ const initialRouteParams: StartScreenNavigationParams = {
     id: 1,
     s: "Start",
 };
+
 const routeConfigMap: NavigationRouteConfigMap = {
     [ROUTE_NAME_START_SCREEN]: {
         path: "start",
@@ -140,6 +141,7 @@ export const AppNavigator = createStackNavigator(
     {
         initialRouteName: ROUTE_NAME_START_SCREEN,
         initialRouteKey: ROUTE_KEY_START_SCREEN,
+        headerLayoutPreset: 'center',
         initialRouteParams,
         navigationOptions,
     },
@@ -614,7 +616,6 @@ createStackNavigator(
 );
 
 // Test NavigationEvents component
-
 const ViewWithNavigationEvents = (
   <NavigationEvents
     onWillFocus={console.log}