代码跟老师的都一样，但就是报错


webpack.json
"dependencies": {
“axios”: “^0.18.0”,
“ejs”: “^2.6.1”,
“koa”: “^2.7.0”,
“koa-router”: “^7.4.0”,
“koa-send”: “^5.0.0”,
“vue”: “^2.6.10”,
“vue-meta”: “^1.6.0”,
“vue-router”: “^3.0.6”,
“vue-server-renderer”: “^2.6.10”,
“vuex”: “^3.1.1”
},
“devDependencies”: {
“autoprefixer”: “7.2.3”,
“babel-core”: “6.26.0”,
“babel-eslint”: “^10.0.1”,
“babel-helper-vue-jsx-merge-props”: “2.0.3”,
“babel-loader”: “^7.1.5”,
“babel-plugin-syntax-dynamic-import”: “^6.18.0”,
“babel-plugin-syntax-jsx”: “6.18.0”,
“babel-plugin-transform-vue-jsx”: “3.5.0”,
“babel-preset-env”: “1.6.1”,
“concurrently”: “^4.1.0”,
“cross-env”: “5.1.3”,
“css-loader”: “0.28.7”,
“eslint”: “^5.16.0”,
“eslint-config-standard”: “^12.0.0”,
“eslint-loader”: “^2.1.2”,
“eslint-plugin-html”: “^5.0.5”,
“eslint-plugin-import”: “^2.17.2”,
“eslint-plugin-node”: “^9.0.1”,
“eslint-plugin-promise”: “^4.1.1”,
“eslint-plugin-standard”: “^4.0.0”,
“eslint-plugin-vue”: “^5.2.2”,
“extract-text-webpack-plugin”: “^4.0.0-beta.0”,
“file-loader”: “^3.0.1”,
“html-webpack-plugin”: “^3.2.0”,
“memory-fs”: “^0.4.1”,
“nodemon”: “^1.19.0”,
“postcss-loader”: “2.0.9”,
“rimraf”: “^2.6.3”,
“style-loader”: “0.19.1”,
“stylus”: “^0.54.5”,
“stylus-loader”: “^3.0.2”,
“url-loader”: “0.6.2”,
“vue-loader”: “^14.2.4”,
“vue-style-loader”: “^4.1.2”,
“vue-template-compiler”: “^2.6.10”,
“webpack”: “^4.31.0”,
“webpack-cli”: “^3.3.2”,
“webpack-dev-server”: “^3.3.1”,
“webpack-merge”: “^4.2.1”
}