text: var gulp = require('gulp');
  var sourcemaps = require('gulp-sourcemaps');
  var babel = require('gulp-babel');
  var concat = require('gulp-concat');
  
  gulp.task('default', function () {
    return gulp.src('src/connector.js')
      .pipe(sourcemaps.init())
      .pipe(babel())
      .pipe(concat('index.js'))
      .pipe(sourcemaps.write())
      .pipe(gulp.dest('.'));  
  });