解决ThinkPHP5.1版本引入composer vendor扩展包的问题

版本说明

旧版本：ThinkPHP5.0

新版本：ThinkPHP5.1

问题：TP5.1 中取消了 Loader::import 方法以及import和vendor助手函数，全部采用命名空间和自动加载机制，导致引入类库找不到报错

解决：因为“全部采用命名空间和自动加载机制”，所以对 composer/installed.json 做了修改（文字说明在下方注释中）

    {         "name": "curl/curl",         "version": "2.3.0",         "version_normalized": "2.3.0.0",         "source": {             "type": "git",             "url": "https://github.com/php-mod/curl.git",             "reference": "3ad560b1fc1bbdf5c7681356ab953fb961f255e5"         },         "dist": {             "type": "zip",             "url": "https://api.github.com/repos/php-mod/curl/zipball/3ad560b1fc1bbdf5c7681356ab953fb961f255e5",             "reference": "3ad560b1fc1bbdf5c7681356ab953fb961f255e5",             "shasum": ""         },         "require": {             "ext-curl": "*",             "php": "^5.6 | ^7.0"         },         "require-dev": {             "phpunit/phpunit": "^5.7",             "squizlabs/php_codesniffer": "~2.1"         },         "time": "2020-03-19T20:07:26+00:00",         "type": "library",         "installation-source": "dist",         "autoload": {             "psr-0": {                 "Curl": "src/"             },             //在此处添加 files 字段，把类库文件的相对路径填入             "files":[                 "vendor/curl/curl/src/Curl/Curl.php"             ]         },         "notification-url": "https://packagist.org/downloads/",         "license": [             "MIT"         ],         "authors": [             {                 "name": "php-curl-class",                 "homepage": "https://github.com/php-curl-class"             },             {                 "name": "Hassan Amouhzi",                 "email": "hassan@anezi.net",                 "homepage": "http://hassan.amouhzi.com"             },             {                 "name": "user52",                 "homepage": "https://github.com/user52"             }         ],         "description": "cURL class for PHP",         "homepage": "https://github.com/php-mod/curl",         "keywords": [             "curl",             "dot"         ]     }