title: Support IE 11 using browserslist and babel
body: <p>I already have this in my <code>.babelrc</code>:</p>
  
  <pre><code>  presets: [
      [
        'env',
        {
          targets: {
            browsers:   'last 2 versions, &gt; 5%'
          },
          modules:      false,
          useBuiltIns:  'entry',
          debug:        true
        }
      ]
    ]
  </code></pre>
  
  <p>Now I want to support IE 11 too. So I added <code>IE 11</code> to the <code>browsers</code> string. But when I test it I still see an error related to custom events for example. Adding a polyfill for it, fixes it. But then I'm seeing another error.</p>
  
  <p>When I run the script I'm seeing:</p>
  
  <pre><code>Using targets:
  {
    "chrome": "65",
    "android": "4.4.3",
    "edge": "16",
    "firefox": "59",
    "ie": "10",
    "ios": "11",
    "safari": "11"
  }
  </code></pre>
  
  <p>I don't want to manually add polyfills for each feature. Anyone knows if adding IE 11 to the browsers string should fix it?</p>