composer.json

{
    "minimum-stability": "dev",
    "prefer-stable": true,
    "require": {
        "felixfbecker/language-server": "^4.1.1"
    },
    "scripts": {
        "parse-stubs": "LanguageServer\\ComposerScripts::parseStubs",
        "post-update-cmd": "@parse-stubs",
        "post-install-cmd": "@parse-stubs"
    },
    "repositories": [
        {
            "type": "package",
            "package": {
                "name": "JetBrains/phpstorm-stubs",
                "version": "dev-master",
                "dist": {
                    "url": "https://github.com/JetBrains/phpstorm-stubs/archive/master.zip",
                    "type": "zip"
                },
                "source": {
                    "url": "https://github.com/JetBrains/phpstorm-stubs",
                    "type": "git",
                    "reference": "master"
                }
            }
        }
    ]
}