{
    "presets": [
        ["env", {
            "modules": false,
            "targets": {
                "browsers": ["> 1%", "last 2 versions", "ie >= 9"]
            }
        }],
        "stage-2"
    ],
    "env": {
        "test": {
            "presets": ["env", "stage-2"],
            "plugins": [["istanbul", {
                "exclude": ["**/*.spec.js", "test/utils.js"]
            }]]
        }
    }
}