Update API badge in README

Author: Tunous

README.md

@@ -3,7 +3,7 @@
 [![Build Status](https://travis-ci.org/Tunous/SwipeActionView.svg?branch=master)](https://travis-ci.org/Tunous/SwipeActionView)
 [![Release](https://jitpack.io/v/Tunous/SwipeActionView.svg)](https://jitpack.io/#Tunous/SwipeActionView)
 [![Android Arsenal](https://img.shields.io/badge/Android%20Arsenal-SwipeActionView-brightgreen.svg?style=flat)](https://android-arsenal.com/details/1/5250)
-[![API](https://img.shields.io/badge/API-11%2B-blue.svg?style=flat)](https://android-arsenal.com/api?level=11)
+[![API](https://img.shields.io/badge/API-14%2B-blue.svg?style=flat)](https://android-arsenal.com/api?level=14)
 
 SwipeActionView is a swipe-able view, which allows users to perform actions by swiping it to the left or right side.