title: tesseract.js returns too long string with base64
body: <p>I would like to test the tesseract.js library on the node.js server, but when running the following code:</p>
  
  <pre><code>var TESSERACT = require('tesseract.js');
  var base64String = 'data:image/png;base64,' + pngInBase64;
  var job1 = TESSERACT.recognize(base64String, {
      progress: show_progress,
      lang: 'ang'
  });
  
  function show_progress(p) {
      console.log(p);
  }
  </code></pre>
  
  <p>It receives an error in the form:</p>
  
  <pre><code>Error: ENAMETOOLONG: name too long, open 'data:image/png;base64,iVBORw0KGgoAAAA ...
  </code></pre>
  
  <p>Is it possible to set (enlarge) the maximum length of the base64 string in some way?</p>