text: let ncp = require('ncp').ncp;
  const ver = require('./package.json').version;
  const path = require('path');
  const rmrf = require('rimraf');
  
  ncp(path.join('docs', 'pitfall.js', ver), 'docs', (e) => {
      if(e) console.error(e);
  
      rmrf(path.join('docs', 'pitfall.js'), (e) => {
          if(e) console.error(e);
      })
  })