title: Gulp build not generating any files
body: <p>I am using the following gulp code to build my deployment files.</p>
  
  <pre><code>var gulp = require('gulp');
  var concat = require('gulp-concat');
  var minify = require('gulp-minify');
  var cleanCss = require('gulp-clean-css');
  
  gulp.task('pack-js', function () {  
      return gulp.src([
          'wp_theme/assets/js/jquery-3.1.1.min.js', 
          'wp_theme/assets/js/bootstrap.min.js', 
          'wp_theme/assets/js/assets/js/device.min.js',
          'wp_theme/assets/js/app.js'
      ])
          .pipe(concat('app-min.js'))
          .pipe(minify())
          .pipe(gulp.dest('./dist/'));
  });
  
  gulp.task('pack-css', function () { 
      return gulp.src([
          'wp_theme/assets/css/normalize.css', 
          'wp_theme/assets/css/bootstrap.min.css',
          'wp_theme/assets/js/slick/slick.css',
          'wp_theme/assets/js/slick/slick-theme.css',
          'wp_theme/assets/css/animate.min.css',
          'wp_theme/assets/fonts/font-awesome/css/font-awesome.css',
          'wp_theme/assets/fonts/font-awesome/css/font-awesome.min.css',
          'wp_theme/style.css',
      ])
          .pipe(concat('style.css'))
          .pipe(cleanCss())
     .pipe(gulp.dest('./dist/'));
  });
  
  gulp.task('default', ['pack-js', 'pack-css']);
  </code></pre>
  
  <p>Next, when I run the "gulp" command like I am not getting any error</p>
  
  <pre><code>$ gulp
  [01:34:53] Using gulpfile ~/{directory path here}/gulpfile.js
  [01:34:53] Starting 'pack-js'...
  [01:34:53] Starting 'pack-css'...
  [01:34:53] Finished 'pack-js' after 28 ms
  [01:34:53] Finished 'pack-css' after 13 ms
  [01:34:53] Starting 'default'...
  [01:34:53] Finished 'default' after 39 μs
  </code></pre>
  
  <p>But in the "dist" folder which is in the same directory as of the "gulpfile.js" doesn't show any generated files.</p>
  
  <p>I checked the version also.</p>
  
  <pre><code>$ gulp -v
  [08:01:40] CLI version 3.9.1
  [08:01:40] Local version 3.9.1
  </code></pre>
  
  <p>Anything I am doing wrong here?</p>