Update screenshot, add publish

Author: awesomejerry

README.md

@@ -1,7 +1,10 @@
 # react-native-qrcode-svg
 A QR Code generator for React Native based on react-native-svg and javascript-qrcode.
 
-![screenshot](./screenshot.png)
+https://circleci.com/gh/awesomejerry/react-native-qrcode-svg.svg?style=shield&circle-token=185bdd4fed561139178638f5b9f9c48ddefc9288
+
+![screenshot](./screenshot-android.png)
+![screenshot](./screenshot-ios.png)
 
 Please install react-native-svg first.
 ```

package.json

@@ -34,6 +34,7 @@
     "babel-preset-es2015": "^6.18.0",
     "babel-preset-react": "^6.16.0",
     "jest": "^16.0.2",
+    "publish": "0.6.0",
     "react": "15.3.2",
     "react-test-renderer": "^15.3.2"
   }