Add prettier config, format script and reformat files

Author: janicduplessis

RNTester/js/SwipeableFlatListExample.js

@@ -74,9 +74,7 @@ const SwipeableFlatListExample = createReactClass({
       <View style={styles.row}>
         <Image style={styles.rowIcon} source={item.icon} />
         <View style={styles.rowData}>
-          <Text style={styles.rowDataText}>
-            {item.data}
-          </Text>
+          <Text style={styles.rowDataText}>{item.data}</Text>
         </View>
       </View>
     );

package.json

@@ -10,6 +10,14 @@
   "engines": {
     "node": ">=4"
   },
+  "prettier": {
+    "requirePragma": true,
+    "singleQuote": true,
+    "trailingComma": "all",
+    "bracketSpacing": false,
+    "jsxBracketSameLine": true,
+    "parser": "flow"
+  },
   "jest": {
     "transform": {
       "^[./a-zA-Z0-9$_-]+\\.(bmp|gif|jpg|jpeg|png|psd|svg|webp)$": "<rootDir>/jest/assetFileTransformer.js",
@@ -118,6 +126,7 @@
     "test": "jest",
     "flow": "flow",
     "lint": "eslint .",
+    "prettier": "find . -name node_modules -prune -or -name '*.js' -print | xargs prettier --write",
     "start": "/usr/bin/env bash -c './scripts/packager.sh \"$@\" || true' --",
     "test-android-setup": "docker pull containership/android-base:latest",
     "test-android-build": "docker build -t react/android -f ContainerShip/Dockerfile.android .",
@@ -201,7 +210,7 @@
     "flow-bin": "^0.54.0",
     "jest": "^21",
     "mock-fs": "^4.4.1",
-    "prettier": "1.7.0",
+    "prettier": "1.7.3",
     "react": "16.0.0-rc.3",
     "react-test-renderer": "16.0.0-rc.3",
     "shelljs": "^0.7.8",