title: How to fix "Support for the experimental syntax 'classProperties' isn't currently enabled" error if it has been already enabled?
body: <p>Im building a crossplatform monorepo application for Web, Android and iOS from this example <a href="https://github.com/brunolemos/react-native-web-monorepo" rel="nofollow noreferrer">https://github.com/brunolemos/react-native-web-monorepo</a> and when I added React Native Base to my project I changed my <code>config-overrides.js</code> according to this guide <a href="https://docs.nativebase.io/docs/GetStarted.html" rel="nofollow noreferrer">https://docs.nativebase.io/docs/GetStarted.html</a> for <strong>Web</strong></p>
  
  <p>But after that I got
  <code>SyntaxError: C:\Users\maksi\Desktop\ecmsk\node_modules\native-base\node_modules\react-native-vector-icons\lib\create-icon-set-from-fontawesome5.js: Support for the experimental syntax 'classProperties' isn't currently enabled</code> error.</p>
  
  <p>I tried adding <code>loose</code> option to <code>@babel/plugin-proposal-class-properties</code> plugin but that didn't work. And I also tried adding <code>plugins</code> to my <code>package.json</code> and that didn't work either.</p>
  
  <p><strong>package.json</strong></p>
  
  <pre><code>{
    "name": "web",
    "version": "0.0.1",
    "private": true,
    "dependencies": {
      "@types/history": "^4.7.2",
      "@types/js-cookie": "^2.2.2",
      "@types/react": "^16.8.23",
      "@types/react-redux": "^7.1.1",
      "@types/redux-api-middleware": "^3.0.1",
      "connected-react-router": "^6.5.2",
      "history": "^4.9.0",
      "js-cookie": "^2.2.0",
      "native-base": "^2.13.4",
      "react": "16.8.4",
      "react-art": "^16.8.6",
      "react-dom": "16.8.4",
      "react-native-elements": "^1.1.0",
      "react-native-vector-icons": "^6.6.0",
      "react-native-web": "0.10.0",
      "react-redux": "^7.1.0",
      "react-router": "^5.0.1",
      "react-scripts": "2.1.8",
      "redux": "^4.0.4",
      "redux-api-middleware": "^3.0.1"
    },
    "scripts": {
      "compile": "tsc -b",
      "prestart": "npm run compile",
      "start": "concurrently \"npm run compile -- -w\" \"npm run _start\"",
      "_start": "react-app-rewired start",
      "prebuild": "npm run compile",
      "build": "react-app-rewired build",
      "pretest": "npm run compile",
      "test": "react-app-rewired test",
      "eject": "react-app-rewired eject"
    },
    "eslintConfig": {
      "extends": "react-app"
    },
    "browserslist": [
      "&gt;0.2%",
      "not dead",
      "not ie &lt;= 11",
      "not op_mini all"
    ],
    "devDependencies": {
      "@babel/plugin-proposal-class-properties": "^7.5.5",
      "babel-plugin-react-native-web": "^0.11.5",
      "concurrently": "*",
      "customize-cra": "^0.4.1",
      "react-app-rewired": "^2.1.3",
      "typescript": "*"
    }
  }
  
  </code></pre>
  
  <p><strong>config-overrides.js</strong></p>
  
  <pre><code>const path = require('path');
  const {
    override,
    addWebpackAlias,
    babelInclude,
    addBabelPlugins
  } = require('customize-cra');
  
  module.exports = override(
    addWebpackAlias({
      "react-native/Libraries/Renderer/shims/ReactNativePropRegistry": "react-native-web/dist/modules/ReactNativePropRegistry",
      "react-native": "react-native-web"
    }),
    babelInclude([
      path.resolve('src'),
      path.resolve('../components/src'),
      path.resolve('../../node_modules/native-base-shoutem-theme'),
      path.resolve('../../node_modules/react-navigation'),
      path.resolve('../../node_modules/react-native-easy-grid'),
      path.resolve('../../node_modules/react-native-drawer'),
      path.resolve('../../node_modules/react-native-safe-area-view'),
      path.resolve('../../node_modules/react-native-vector-icons'),
      path.resolve('../../node_modules/react-native-keyboard-aware-scroll-view'),
      path.resolve('../../node_modules/react-native-web'),
      path.resolve('../../node_modules/react-native-tab-view'),
      path.resolve('../../node_modules/static-container'),
    ]),
    addBabelPlugins(
      "@babel/plugin-proposal-class-properties"
    ),
  );
  </code></pre>