title: Babel Preset does not provide support on IE11 for Object.assign - "Object doesn't support property or method 'assign'"
body: <p>I am using <strong>babel-preset-env version - 1.6.1</strong> for my react app, i am getting a error on IE :- <em>Object doesn't support property or method 'assign'</em>
  <a href="https://i.stack.imgur.com/TmBJo.png" rel="noreferrer"><img src="https://i.stack.imgur.com/TmBJo.png" alt="enter image description here"></a></p>
  
  <p>this is my <strong>.babelrc</strong> :-</p>
  
  <pre><code>{
  "presets": [
      "react",
      [
          "env",
          {
              "targets": {
                  "browsers": [
                      "last 1 versions",
                      "ie &gt;= 11"
                  ]
              },
              "debug": true,
              "modules": "commonjs"
          }
      ]
  ],
  "env": {
      "test": {
          "presets": [
              [
                  "babel-preset-env",
                  "react"
              ]
          ],
          "plugins": [
              "transform-object-rest-spread",
              "transform-class-properties",
              "transform-runtime",
              "babel-plugin-dynamic-import-node",
              "array-includes",
              "url-search-params-polyfill",
              "transform-object-assign"
          ]
      }
  },
  "plugins": [
      "transform-object-rest-spread",
      "transform-class-properties",
      "syntax-dynamic-import",
      "transform-runtime",
      "array-includes",
      "url-search-params-polyfill",
      "transform-object-assign"
  ]
  </code></pre>
  
  <p>}</p>
  
  <p>i tried these polyfills :-</p>
  
  <p><a href="https://babeljs.io/docs/plugins/transform-object-assign/" rel="noreferrer">https://babeljs.io/docs/plugins/transform-object-assign/</a>
  <a href="https://www.npmjs.com/package/babel-plugin-object-assign" rel="noreferrer">https://www.npmjs.com/package/babel-plugin-object-assign</a></p>
  
  <p>but it didn't work </p>
  
  <p>i am using syntax:- </p>
  
  <pre><code>let a = Object.assign({},obj);
  </code></pre>
  
  <p>everywhere in my project</p>
  
  <p>i need a polyfill that would work for my project.</p>