Bump navigator dependencies to alpha versions

packages/react-navigation/examples/NavigationPlayground/App.js

@@ -1,7 +1,10 @@
+import { Platform } from 'react-native';
 import { useScreens } from 'react-native-screens';
 
 // Uncomment this to use react-native-screens
-// useScreens();
+// if (Platform.OS === 'android') {
+//  useScreens();
+// }
 
 import App from './js/App';
 export default App;

packages/react-navigation/examples/NavigationPlayground/app.json

@@ -23,4 +23,4 @@
       "package": "com.reactnavigation.example"
     }
   }
-}
+}

packages/react-navigation/examples/NavigationPlayground/js/Drawer.js

@@ -22,7 +22,7 @@ const MyNavScreen = ({ navigation, banner }) => (
         onPress={() => navigation.navigate('Email')}
         title="Open other screen"
       />
-      <Button onPress={() => navigation.goBack(null)} title="Go back" />
+      <Button onPress={() => navigation.navigate('Index')} title="Go back" />
     </SafeAreaView>
     <StatusBar barStyle="default" />
   </ScrollView>

packages/react-navigation/package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-navigation",
-  "version": "2.17.0",
+  "version": "3.0.0-alpha.5",
   "description": "Routing and navigation for your React Native apps",
   "main": "src/react-navigation.js",
   "repository": {
@@ -37,10 +37,10 @@
     "query-string": "^6.1.0",
     "react-lifecycles-compat": "^3",
     "react-native-safe-area-view": "0.11.0",
-    "react-native-screens": "^1.0.0-alpha.11",
+    "react-native-screens": "^1.0.0-alpha.12",
     "react-navigation-deprecated-tab-navigator": "1.3.0",
-    "react-navigation-drawer": "0.5.0",
-    "react-navigation-stack": "0.7.0",
+    "react-navigation-drawer": "1.0.0-alpha.3",
+    "react-navigation-stack": "1.0.0-alpha.14",
     "react-navigation-tabs": "0.8.2"
   },
   "devDependencies": {