text: var gulp = require('gulp'),
      a11y = require('gulp-a11y'),
      notify = require('gulp-notify');
   
  gulp.task('a11y', function () {
    return gulp.src('./_site/**/*.html')
      .pipe(a11y({
        viewportSize: '800x600',
        delay: 1
      }))
      .pipe(a11y.reporter())
      .pipe(notify({ message: 'A11y test complete' }));
  });