title: Can't update react-dom 15.6.1 to 16.x.x
body: <p>I want to update my react app that I created with VS2017 to react 16 so I can use fragments. Updating the 'react' package works fine but I'm struggling with 'react-dom'.</p>
  
  <p>Steps to reproduce (what I've done):</p>
  
  <ol>
  <li>Open VS2017</li>
  <li>Create new 'ASP.NET Core Web Application'</li>
  <li>Select 'React.js and Redux'</li>
  <li>Edit package.json like this:</li>
  </ol>
  
  <blockquote>
  <pre><code>"devDependencies": { 
      "@types/react": "^16.3.14", 
      "@types/react-dom": "^16.0.5",
      "react": "^16.3.2",
      "react-dom": "^16.3.2"
   }
  </code></pre>
  </blockquote>
  
  <ol start="5">
  <li>Edit a file in ClientApp (eg. ClientApp/boot-client.tsx)</li>
  </ol>
  
  <blockquote>
  <pre><code>import * as React from 'react';
  import * as ReactDOM from 'react-dom';
  console.log(React.version);
  console.log(ReactDOM.version);
  </code></pre>
  </blockquote>
  
  <ol start="6">
  <li>Update npm packages (Right click on package.json -> Restore or 'npm install' in project directory)</li>
  </ol>
  
  <p>Excpected output from those two console.log lines:</p>
  
  <pre><code>16.3.2
  16.3.2
  </code></pre>
  
  <p>Actual output:</p>
  
  <pre><code>16.3.2
  15.6.1
  </code></pre>
  
  <p>Now that the 'react-dom' version isn't 16.x.x I can't use fragments.
  I checked following files and all versions seem to be correct (16.x.x)</p>
  
  <pre><code>npm_modules/@types/react/package.json
  npm_modules/@types/react-dom/package.json
  npm_modules/react/package.json
  npm_modules/react-dom/package.json
  </code></pre>
  
  <p>I can't figure out, what I'm doing wrong. Any help is appreciated.</p>