Updated Version of RN Elements in Readme

Author: dabit3

package.json

@@ -9,7 +9,7 @@
     "lodash": "^4.15.0",
     "react": "15.3.1",
     "react-native": "0.33.0",
-    "react-native-elements": "0.4.6",
+    "react-native-elements": "0.4.8",
     "react-native-tab-navigator": "^0.3.3",
     "react-native-vector-icons": "^2.1.0",
     "react-redux": "^4.4.5",