bump version and update readme

Author: sohobloo

README.md

@@ -19,14 +19,18 @@ You can find them in the example.
 
 ## Update History
 
+### v0.6.1
+- Fix [#127](https://github.com/sohobloo/react-native-modal-dropdown/issues/127) `renderButtonText` does not work on `select(idx)`  (Thanks to [@swb2016](https://github.com/swb2016))
+- Code optimization.
+
 ### v0.6.0
 - Introduce `renderButtonText` property to extract button text from object array data.
 
 [Full update history list](https://github.com/sohobloo/react-native-modal-dropdown/wiki/Update-History)
 
 ## Installation
 ```sh
-npm i react-native-modal-dropdown -S
+npm i react-native-modal-dropdown -save
 ```
 
 ## Usage

example/package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-native-modal-dropdown-demo",
-  "version": "0.6.0",
+  "version": "0.6.1",
   "description": "A demo for react-native-modal-dropdown component.",
   "homepage": "https://github.com/sohobloo/react-native-modal-dropdown",
   "license": "MIT",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-native-modal-dropdown",
-  "version": "0.6.0",
+  "version": "0.6.1",
   "description": "A react-native dropdown component for both iOS and Android.",
   "keywords": [
     "react",