{
  "config": {
    "vendor-dir": "public_html/app/vendor"
  },
  "require": {
    "mailgun/mailgun-php": "~1.7.2",
    "phpunit/phpunit": "^5.7"
  }
}

{
  "config": {
    "vendor-dir": "public_html/app/vendor"
  },
  "require": {
    "mailgun/mailgun-php": "~1.7.2"
  },
  "required-dev": {
    "phpunit/phpunit": "^5.7"
  }
}

Load PHPUnit only on dev environment.
Load PHPUnit only on dev environment.
