title: Error "User limit of inotify watches reached". ExtReact build
body: <p>I installed ExtReact, with examples. When I run</p>
  
  <pre><code>npm start
  </code></pre>
  
  <p>I get an error: </p>
  
  <pre><code>ERROR in [@extjs/reactor-webpack-plugin]: Error:
  [ERR] BUILD FAILED
  [ERR] com.sencha.exceptions.BasicException: User limit of inotify watches 
  reached
  [ERR]
  [ERR] Total time: 13 seconds
  
  [ERR] /home/user/project/build/ext-react/build.xml:101: 
  com.sencha.exceptions.BasicException: User limit of inotify watches reached
  [ERR] A log is available in the file "/home/user/project/build/ext-
  react/sencha-error-20171027.log"
  </code></pre>
  
  <p>How to fix this error?</p>