update github workflows to use xcode 13.2

Author: skyfe79

.github/workflows/main.yml

@@ -10,6 +10,9 @@ jobs:
     runs-on: macos-11
     name: Testing PR
     steps:
+      - uses: maxim-lobanov/setup-xcode@v1
+        with:
+          xcode-version: '13.2'
       - name: checkout
         uses: actions/checkout@v2
       - name: show sdks

README.md

@@ -5,6 +5,7 @@
 ![license MIT](https://img.shields.io/cocoapods/l/Redux.svg)
 ![Platform](https://img.shields.io/badge/iOS-%3E%3D%2013.0-green.svg)
 ![Platform](https://img.shields.io/badge/macos-%3E%3D%2010.15-green.svg)
+![Xcode](https://img.shields.io/badge/xcode-%3E%3D%2013.2-orange.svg)
 [![Swift 5.5](https://img.shields.io/badge/Swift-5.5-orange.svg?style=flat)](https://developer.apple.com/swift/)
 
 Implementing Redux with async/await introduced in Swift 5.5 has become very simple. From Xcode 13.2, Swift 5.5's new concurrency supports iOS 13. Therefore, the existing Redux package was newly implemented based on async/await.

README_ko.md

@@ -5,6 +5,7 @@
 ![license MIT](https://img.shields.io/cocoapods/l/Redux.svg)
 ![Platform](https://img.shields.io/badge/iOS-%3E%3D%2013.0-green.svg)
 ![Platform](https://img.shields.io/badge/macos-%3E%3D%2010.15-green.svg)
+![Xcode](https://img.shields.io/badge/xcode-%3E%3D%2013.2-orange.svg)
 [![Swift 5.5](https://img.shields.io/badge/Swift-5.5-orange.svg?style=flat)](https://developer.apple.com/swift/)
 
 Swift 5.5에서 소개된 async/await로 Redux를 구현하는 일이 매우 간소해졌습니다. Xcode 13.2 버전부터는 Swift 5.5의 새로운 Concurrency가 iOS 13을 지원한다고 합니다. 이에 기존의 Redux 패키지를 async/await 를 바탕으로 새로 구현하였습니다.