添加lodash依赖

package.json

    "gulp-load-plugins": "1.5.0",
    "gulp-replace": "0.6.1",
    "gulp-shell": "0.6.5",
    "lodash": "4.17.5",
    "vue": "2.5.2",
    "vue-cookie": "1.1.4",
    "vue-router": "3.0.1",