Update example

Author: Pontus Abrahamsson

Example/package.json

@@ -4,20 +4,14 @@
   "private": true,
   "scripts": {
     "start": "node node_modules/react-native/local-cli/cli.js start",
-    "test": "jest"
+    "start:ios": "react-native run-ios"
   },
   "dependencies": {
     "react": "16.5.0",
     "react-native": "0.57.1",
     "react-native-image-manipulator": "file:../"
   },
   "devDependencies": {
-    "babel-jest": "23.6.0",
-    "jest": "23.6.0",
-    "metro-react-native-babel-preset": "0.46.0",
-    "react-test-renderer": "16.5.0"
-  },
-  "jest": {
-    "preset": "react-native"
+    "metro-react-native-babel-preset": "0.46.0"
   }
 }