old_contents: var os = require('os');
  var path = require('path');
  
  module.exports = function(grunt) {
    var atomShellDownloadDir = path.join(os.tmpdir(), 'atom-cached-atom-shells')
  
    grunt.initConfig({
      'download-atom-shell': {
        version: '0.13.2',
        outputDir: 'atom-shell',
        downloadDir: atomShellDownloadDir,
        rebuild: true
      }
    });
  
    grunt.loadNpmTasks('grunt-download-atom-shell');
  };
  
new_contents: var os = require('os');
  var path = require('path');
  
  module.exports = function(grunt) {
    var atomShellDownloadDir = path.join(os.tmpdir(), 'atom-cached-atom-shells')
  
    grunt.initConfig({
      'download-atom-shell': {
        version: '0.13.3',
        outputDir: 'atom-shell',
        downloadDir: atomShellDownloadDir,
        rebuild: true
      }
    });
  
    grunt.loadNpmTasks('grunt-download-atom-shell');
  };
  
subject: Bump atom-shell version