composer.json中新增命名空间规则
    如：新增腾讯云SDK（TencentCloud）

    1. "autoload": {
    2.         "psr-4": {
    3.             "App\\": "app/",
    4.             "TencentCloud\\": "vendor/tencentcloud/tencentcloud-sdk-php/src/TencentCloud"
    5.         },
    6.     },