{
    "name": "danmurf/metatag",
    "description": "An html head meta tag generator.",
    "type": "library",
    "require-dev": {
        "phpspec/phpspec": "^4.3"
    },
    "license": "MIT",
    "authors": [
        {
            "name": "Dan Murfitt",
            "email": "dan@murfitt.net"
        }
    ],
    "require": {
      "php": ">=5.6.4"
    },
    "autoload": {
        "psr-4": {
            "danmurf\\": "src/"
        }
    },
    "autoload-dev": {
        "classmap": [
            "tests/TestCase.php"
        ]
    }
}

{
    "name": "danmurf/metatag",
    "description": "An html head meta tag generator.",
    "type": "library",
    "require-dev": {
        "phpspec/phpspec": "^4.3"
    },
    "license": "MIT",
    "authors": [
        {
            "name": "Dan Murfitt",
            "email": "dan@murfitt.net"
        }
    ],
    "require": {
      "php": ">=7.0"
    },
    "autoload": {
        "psr-4": {
            "danmurf\\": "src/"
        }
    }
}

Change requirements to >= php 7
Change requirements to >= php 7
