old_contents: import factory from './factory/grid-factory';
  
  module.exports = {
    version: '0.1.0-30',
    GridView: require('./grid-view'),
    projections: require('./projection/index'),
    layout: require('./layout/index'),
    factory,
    popupEditorPrompt: require('./popup-editor/index'),
  };
  
new_contents: import factory from './factory/grid-factory';
  
  module.exports = {
    version: '0.1.0-31',
    GridView: require('./grid-view'),
    projections: require('./projection/index'),
    layout: require('./layout/index'),
    factory,
    popupEditorPrompt: require('./popup-editor/index'),
  };
  
subject: change the version in index.js