composer.json

{
    "require": {
        "phpoffice/phpspreadsheet": "^1.3"
    },
    "require-dev": {
        "phpunit/phpunit": "^6.5"
    },
    "autoload": {
        "psr-4": {
            "qfq\\": ["qfq/",
                "Source/api/",
                "Source/external/",
                "Source/core/",
                "Source/core/database/",
                "Source/core/exceptions/",
                "Source/core/form/",
                "Source/core/helper/",
                "Source/core/report/",
                "Source/core/store/"]
        }
    }
}