update demo rn version to 0.57.0

demo/.babelrc

@@ -1,3 +1,3 @@
 {
-  "presets": ["react-native"]
+  "presets": ["module:metro-react-native-babel-preset"]
 }

demo/package.json

@@ -7,13 +7,14 @@
     "test": "jest"
   },
   "dependencies": {
-    "react": "16.4.1",
-    "react-native": "0.56.0",
+    "react": "16.5.0",
+    "react-native": "0.57.0",
     "react-native-autoheight-webview": "../"
   },
   "devDependencies": {
+    "babel-core": "^7.0.0-0",
     "babel-jest": "23.4.0",
-    "babel-preset-react-native": "5.0.2",
+    "metro-react-native-babel-preset": "^0.45.0",
     "jest": "23.4.1",
     "react-test-renderer": "16.4.1"
   },