composer.json

{
    "name": "vendor-name/plugin-name",
    "description": "This is a short description of what the plugin does.",
    "type": "wordpress-plugin",
    "keywords": ["wordpress", "plugin"],
    "homepage": "http://example.com/",
    "license": "GPL-2.0+",
    "authors": [
      {
          "name": "Your Name",
          "email": "email@example.com",
          "homepage": "http://example.com/"
      }
    ],
    "support": {
        "issues": "http://example.com/",
        "source": "http://example.com/"
    },
    "autoload": {
        "psr-4": {
            "Vendor_Name\\Plugin_Name\\": "lib/"
        }
    },
    "autoload-dev": {
        "psr-4": {
            "Vendor_Name\\Tests\\Plugin_Name\\": "tests/"
        }
    },
    "require": {
        "php": ">=5.3.0",
        "composer/installers": "~1.0"
    },
    "require-dev": {
        "phpunit/phpunit": "*@stable"
    },
    "suggest": {}
}