{
    "name": "benrowe/formatter",
    "type": "library",
    "description": "A value formatter to display data to end users",
    "keywords": ["benrowe","formatter", "output", "view"],
    "homepage": "https://github.com/benrowe/formatter",
    "license": "MIT",
    "authors": [
        {
            "name": "Ben Rowe",
            "email": "ben.rowe.83@gmail.com",
            "homepage": "http://benrowe.info/formatter",
            "role": "Developer"
        }
    ],
    "require": {
        "php" : "~5.4|~7.0"
    },
    "require-dev": {
        "phpunit/phpunit" : "~4.0||~5.0",
        "scrutinizer/ocular": "~1.1",
        "squizlabs/php_codesniffer": "~2.3"
    },
    "suggest": {
        "carbon/carbon": "^2.0"
    },
    "autoload": {
        "psr-4": {
            "Benrowe\\Formatter\\": "src/"
        }
    },
    "autoload-dev": {
        "psr-4": {
            "Benrowe\\Formatter\\Tests\\": "tests"
        }
    },
    "scripts": {
        "test": "phpunit",
        "format": "phpcbf --standard=psr2 src/"
    },
    "extra": {
        "branch-alias": {
            "dev-master": "1.0-dev"
        }
    },
    "config": {
        "sort-packages": true
    }
}

{
    "name": "benrowe/formatter",
    "type": "library",
    "description": "A value formatter to display data to end users",
    "keywords": ["benrowe","formatter", "output", "view"],
    "homepage": "https://github.com/benrowe/formatter",
    "license": "MIT",
    "authors": [
        {
            "name": "Ben Rowe",
            "email": "ben.rowe.83@gmail.com",
            "homepage": "http://benrowe.info/formatter",
            "role": "Developer"
        }
    ],
    "require": {
        "php": "~5.4|~7.0"
    },
    "require-dev": {
        "phpunit/phpunit" : "~4.0||~5.0",
        "scrutinizer/ocular": "~1.1",
        "squizlabs/php_codesniffer": "~2.3",
        "nesbot/carbon": "^1.21|^2.0"
    },
    "suggest": {
        "carbon/carbon": "^1.21|^2.0"
    },
    "autoload": {
        "psr-4": {
            "Benrowe\\Formatter\\": "src/"
        }
    },
    "autoload-dev": {
        "psr-4": {
            "Benrowe\\Formatter\\Tests\\": "tests"
        }
    },
    "scripts": {
        "test": "phpunit",
        "format": "phpcbf --standard=psr2 src/"
    },
    "extra": {
        "branch-alias": {
            "dev-master": "1.0-dev"
        }
    },
    "config": {
        "sort-packages": true
    }
}

Add carbon as dev dependency
Add carbon as dev dependency
