docs: add auto-release badge

Author: mtrezza

README.md

@@ -9,6 +9,7 @@
 [![Build Status Carthage](https://circleci.com/gh/parse-community/Parse-SDK-iOS-OSX.svg?style=shield)](https://circleci.com/build-insights/gh/parse-community/Parse-SDK-iOS-OSX/master)
 [![Snyk Badge](https://snyk.io/test/github/parse-community/Parse-SDK-iOS-OSX/badge.svg)](https://snyk.io/test/github/parse-community/Parse-SDK-iOS-OSX)
 [![Coverage](https://img.shields.io/codecov/c/github/parse-community/Parse-SDK-iOS-OSX/master.svg)](https://codecov.io/github/parse-community/Parse-SDK-iOS-OSX?branch=master)
+[![auto-release](https://img.shields.io/badge/%F0%9F%9A%80-auto--release-9e34eb.svg)](https://github.com/parse-community/Parse-SDK-iOS-OSX/releases)
 
 ![Platforms](http://img.shields.io/cocoapods/p/Parse.svg?style=flat)
 [![Carthage](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/carthage/carthage)