title: PostCSS Loader has been initialized using an options object that does not match the API schema
body: <p>I'm having this problem after upgrading react-scripts from version 4 to 5!</p>
  <hr />
  <p>I use customize-cra with the option below:</p>
  <pre><code>module.exports = override(
    addLessLoader({
      lessOptions: {
        javascriptEnabled: true,
        modifyVars: {
          '@primary-color': '#038fde',
        },
      },
    }),
    useBabelRc(),
  );
  </code></pre>
  <hr />
  <pre><code>ERROR in ./src/styles/wieldy.less (./node_modules/css-loader/dist/cjs.js??ruleSet[1].rules[1].oneOf[9].use[1]!./node_modules/postcss-loader/dist/cjs.js??ruleSet[1].rules[1].oneOf[9].use[2]!./node_modules/resolve-url-loader/index.js??ruleSet[1].rules[1].oneOf[9].use[3]!./node_modules/less-loader/dist/cjs.js??ruleSet[1].rules[1].oneOf[9].use[4]!./src/styles/wieldy.less)
  
  Module build failed (from ./node_modules/postcss-loader/dist/cjs.js):
  ValidationError: Invalid options object. PostCSS Loader has been initialized using an options object that does not match the API schema.
   - options has an unknown property 'plugins'. These properties are valid:
     object { postcssOptions?, execute?, sourceMap?, implementation? }
      at validate (C:\Workspace\harv-Harvest-frontend\node_modules\schema-utils\dist\validate.js:105:11)
      at Object.getOptions (C:\Workspace\harv-Harvest-frontend\node_modules\webpack\lib\NormalModule.js:580:19)
      at Object.loader (C:\Workspace\harv-Harvest-frontend\node_modules\postcss-loader\dist\index.js:40:24)
  </code></pre>