Docs: Update syntax in readme example

Author: phated

README.md

@@ -47,7 +47,7 @@ gulp.task('clean', function() {
   return del(['build']);
 });
 
-gulp.task('scripts', ['clean'], function() {
+gulp.task('scripts', function() {
   // Minify and copy all JavaScript (except vendor scripts)
   // with sourcemaps all the way down
   return gulp.src(paths.scripts)
@@ -60,7 +60,7 @@ gulp.task('scripts', ['clean'], function() {
 });
 
 // Copy all static images
-gulp.task('images', ['clean'], function() {
+gulp.task('images', function() {
   return gulp.src(paths.images)
     // Pass in options to the task
     .pipe(imagemin({optimizationLevel: 5}))
@@ -69,12 +69,13 @@ gulp.task('images', ['clean'], function() {
 
 // Rerun the task when a file changes
 gulp.task('watch', function() {
-  gulp.watch(paths.scripts, ['scripts']);
-  gulp.watch(paths.images, ['images']);
+  gulp.watch(paths.scripts, 'scripts');
+  gulp.watch(paths.images, 'images');
 });
 
+gulp.task('all', gulp.parallel('watch', 'scripts', 'images'));
 // The default task (called when you run `gulp` from cli)
-gulp.task('default', ['watch', 'scripts', 'images']);
+gulp.task('default', gulp.series('clean', 'all'));
 ```
 
 ## Incremental Builds