title: Vue cli 3 and IE 11
body: <p>I have Vue cli 3.0.0-rc.10. We use TypeScript3 in class style. I want use IE11. I see error in IE 11, about not support arrow function in sl-vue-tree plugin.</p>
  
  <p>I tried</p>
  
  <pre><code>// babel.config.js
  process.env.VUE_CLI_BABEL_TRANSPILE_MODULES = true;
  
  module.exports = {
      "presets": [
          [
              "@vue/app",
              {
                  "useBuiltIns": "entry",
              }
          ]
      ]
  }
  </code></pre>
  
  <p>and import ‘@babel/polyfill’; in enter file - <strong>not work</strong></p>
  
  <p>Only work</p>
  
  <pre><code>// vue.config.js
  module.exports = {
  transpileDependencies:[
  ‘sl-vue-tree’,
  ]
  };
  </code></pre>
  
  <p>Now in production mode all is Ok, but i got error in development mode "export ‘default’ (imported as ‘SlVueTree’) was not found in ‘sl-vue-tree’</p>
  
  <p>How solve problem?</p>