Update composer version semantic constraints (#240)

 Update composer version semantic constraints

Author: sy-records

.github/workflows/install.yml

@@ -0,0 +1,29 @@
+name: Support Multiple Versions
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  install:
+    name: PHP${{ matrix.php-version }} Test Install
+    runs-on: "${{ matrix.os }}"
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+        php-version: ['5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0']
+      max-parallel: 10
+      fail-fast: false
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php-version }}
+          coverage: none
+
+      - name: Setup Dependencies
+        run:
+          composer install -o

README.md

@@ -2,12 +2,13 @@
 
 腾讯云 COS-PHP-SDK-V5（[XML API](https://cloud.tencent.com/document/product/436/7751)）
 
+[![PHP Version](http://poser.pugx.org/qcloud/cos-sdk-v5/require/php)](https://packagist.org/packages/qcloud/cos-sdk-v5)
 [![License](https://poser.pugx.org/qcloud/cos-sdk-v5/license)](LICENSE)
 [![Latest Stable Version](https://poser.pugx.org/qcloud/cos-sdk-v5/v/stable)](https://packagist.org/packages/qcloud/cos-sdk-v5)
 [![Total Downloads](https://img.shields.io/packagist/dt/qcloud/cos-sdk-v5.svg?style=flat)](https://packagist.org/packages/qcloud/cos-sdk-v5)
 [![Build Status](https://api.travis-ci.com/tencentyun/cos-php-sdk-v5.svg?branch=master)](https://app.travis-ci.com/github/tencentyun/cos-php-sdk-v5)
 [![codecov](https://codecov.io/gh/tencentyun/cos-php-sdk-v5/branch/master/graph/badge.svg)](https://codecov.io/gh/tencentyun/cos-php-sdk-v5)
-[![PHP Version](http://poser.pugx.org/qcloud/cos-sdk-v5/require/php)](https://packagist.org/packages/qcloud/cos-sdk-v5)
+[![Support Multiple Versions](https://github.com/tencentyun/cos-php-sdk-v5/actions/workflows/install.yml/badge.svg)](https://github.com/tencentyun/cos-php-sdk-v5/actions/workflows/install.yml)
 
 ## 依赖
 

composer.json

@@ -35,9 +35,9 @@
         "ext-curl": "*",
         "ext-json": "*",
         "ext-simplexml": "*",
-        "guzzlehttp/guzzle": ">=6.2.1",
-        "guzzlehttp/guzzle-services": ">=1.1",
-        "guzzlehttp/psr7": "<=2.1"
+        "guzzlehttp/guzzle": "^6.2.1 || ^7.0",
+        "guzzlehttp/guzzle-services": "^1.1",
+        "guzzlehttp/psr7": "^1.3.1 || ^2.0"
     },
     "config": {
         "platform-check": false