Update dev gulp tasks

Signed-off-by: Matt Stratton <matt.stratton@gmail.com>

Author: mattstratton

gulp/tasks/development/build-dev.js

@@ -1,8 +1,3 @@
-var gulp = require('gulp'),
-  runSequence = require('run-sequence');
+var gulp = require('gulp');
 
-gulp.task('dev', function (callback) {
-  runSequence('bower', 'sass', 'js-concat', 'watch',
-    callback
-  )
-})
+gulp.task('dev', gulp.series('bower', 'sass', 'js-concat', 'watch'));

gulp/tasks/development/local-imagemin.js

@@ -1,7 +1,6 @@
 var gulp = require('gulp'),
     imagemin = require('gulp-imagemin'),
     cache = require('gulp-cache');
-runSequence = require('run-sequence');
 
 
 
@@ -18,8 +17,6 @@ gulp.task('optimize-local-theme-images', function() {
 });
 
 
-gulp.task('optimize-local-images', function(callback) {
-    runSequence('optimize-local-content-images', 'optimize-local-theme-images',
-        callback
-    )
-})
+gulp.task('optimize-local-images', gulp.parallel('optimize-local-content-images', 'optimize-local-theme-images'));
+
+