Update react-router-native types

* Fix AndroidBackButton children
* Add BackButton component
* Add initialEntries and initialIndex to NativeRouter

types/react-router-native/index.d.ts

@@ -1,6 +1,7 @@
-// Type definitions for React Router Native 4.0
+// Type definitions for React Router Native 4.2
 // Project: https://github.com/ReactTraining/react-router-native
 // Definitions by: Eduard Zintz <https://github.com/ezintz>
+//                 Fernando Helwanger <https://github.com/fhelwanger>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.6
 
@@ -22,11 +23,12 @@ export {
 import * as React from 'react';
 import * as H from 'history';
 
-export interface AndroidBackButtonProps {
-  children: React.Component[];
+export interface BackButtonProps {
+  children?: React.ReactNode;
 }
 
-export class AndroidBackButton extends React.Component<AndroidBackButtonProps> {}
+export class BackButton extends React.Component<BackButtonProps> {}
+export class AndroidBackButton extends React.Component<BackButtonProps> {}
 
 export class DeepLinking extends React.Component {}
 
@@ -42,6 +44,8 @@ export class Link extends React.Component<LinkProps> {}
 export interface NativeRouterProps {
   getUserConfirmation?: Function;
   keyLength?: number;
+  initialEntries?: string[];
+  initialIndex?: number;
 }
 
 export class NativeRouter extends React.Component<NativeRouterProps> {}

types/react-router-native/react-router-native-tests.tsx

@@ -1,6 +1,6 @@
 import * as React from 'react';
 import { StyleSheet, Text, View } from 'react-native';
-import { NativeRouter as Router, Route, Link } from 'react-router-native';
+import { NativeRouter as Router, Route, Link, AndroidBackButton, BackButton } from 'react-router-native';
 
 const Home: React.SFC = () => {
   return (
@@ -27,19 +27,22 @@ const About: React.SFC = () => {
 export default class App extends React.Component {
   render() {
     return (
-      <Router>
-        <View style={styles.container}>
-          <View style={styles.nav}>
-            <Link to="/" style={styles.navItem}>
-              <Text>Home</Text>
-            </Link>
-            <Link to="/about" style={styles.navItem}>
+      <Router initialEntries={['/']} initialIndex={0}>
+        <BackButton />
+        <AndroidBackButton>
+          <View style={styles.container}>
+            <View style={styles.nav}>
+              <Link to="/" style={styles.navItem}>
+                <Text>Home</Text>
+              </Link>
+              <Link to="/about" style={styles.navItem}>
                 <Text>About</Text>
-            </Link>
+              </Link>
+            </View>
+            <Route exact path="/" component={Home} />
+            <Route path="/about" component={About} />
           </View>
-          <Route exact path="/" component={Home}/>
-          <Route path="/about" component={About}/>
-        </View>
+        </AndroidBackButton>
       </Router>
     );
   }