chore(package): update react-native-button to version 1.7.0

https://greenkeeper.io/

Author: greenkeeperio-bot

package.json

@@ -39,7 +39,7 @@
     "react-native": "0.32.0",
     "react-native-android-tablayout": "0.3.0",
     "react-native-animatable": "0.6.1",
-    "react-native-button": "1.6.0",
+    "react-native-button": "1.7.0",
     "react-native-calendar": "0.6.4",
     "react-native-collapsible": "0.7.0",
     "react-native-communications": "2.1.0",