code: function copy(cb) {
      gulp.src(['adal-angular.d.ts']).pipe(gulp.dest('./dist/'));
      console.log('adal-angular.d.ts Copied to Dist Directory');
  
      gulp.src(['README.md']).pipe(gulp.dest('./dist/'));
      console.log('README.md Copied to Dist Directory');
  
      cb();
  }
docs: 4.  include type definition file for adal-angular