title: ValidationError: Invalid options object. CSS Loader has been initialised using an options object that does not match the API schema
body: <p>I am using <code>@zeit/next-css</code> to import css files into my components and pages file but it's throwing me this error </p>
  
  <p><code>./styles/navbar.css</code> importing this css file in my <code>navbar.js</code> in components and I'm getting this error</p>
  
  <pre><code>ValidationError: Invalid options object. CSS Loader has been initialised using
       an options object that does not match the API schema.
  - options has an unknown property 'minimize'. These properties are valid:
     object { url?, import?, modules?, sourceMap?, importLoaders?, localsConvention?, onlyLocals? }
  </code></pre>
  
  <p>my <code>next.config.js</code> is placed where <code>package.json</code> is </p>
  
  <pre><code>const withCSS = require("@zeit/next-css");
  module.exports = withCSS();
  </code></pre>
  
  <p>my package json</p>
  
  <pre><code>{
    "name": "transfer-to",
    "version": "0.1.0",
    "private": true,
    "scripts": {
      "dev": "next dev",
      "build": "next build",
      "start": "next start"
    },
    "dependencies": {
      "@zeit/next-css": "^1.0.1",
      "isomorphic-unfetch": "^3.0.0",
      "next": "9.0.7",
      "react": "16.10.2",
      "react-dom": "16.10.2"
    }
  }
  </code></pre>