Update SampleApp to RN 0.57.8

Author: peacechen

SampleApp/.babelrc

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

SampleApp/README.md

@@ -18,3 +18,8 @@ $ npm run nodemon
 ```
 
 You can now edit the files in `../`, and they will be synced to `node_modules/react-native-modal-selector/`
+
+
+# Modifying react-native-modal-selector (RNMS) code during development
+
+The RNMS source code is copied post-install due to a circular symlink bug.  If the RNMS code changes, you must run `npm run postinstall` to update it in this sample app.

SampleApp/package.json

@@ -6,20 +6,20 @@
     "start": "node node_modules/react-native/local-cli/cli.js start",
     "flow": "flow --show-all-errors",
     "test": "jest",
-    "postinstall": "rm -rf node_modules/react-native-modal-selector/SampleApp",
+    "postinstall": "cp -f ../*.js node_modules/react-native-modal-selector/",
     "nodemon": "nodemon nodemon.json"
   },
   "dependencies": {
-    "react": "16.4.1",
-    "react-native": "0.56.0",
-    "react-native-modal-selector": "file:../"
+    "react": "16.6.3",
+    "react-native": "0.57.8",
+    "react-native-modal-selector": "*"
   },
   "devDependencies": {
-    "babel-jest": "23.4.2",
-    "babel-preset-react-native": "^5",
-    "jest": "23.5.0",
+    "babel-jest": "23.6.0",
+    "jest": "23.6.0",
+    "metro-react-native-babel-preset": "0.51.1",
     "nodemon": "^1.18.3",
-    "react-test-renderer": "16.4.1"
+    "react-test-renderer": "16.6.3"
   },
   "jest": {
     "preset": "react-native"