Fixing gulp size if not is production

Author: nandomoreirame

lib/stylesheets.js

@@ -28,7 +28,7 @@ module.exports = (gulp, options, othersTasks = []) => {
     .pipe(opts.gzip ? $.gzip({
       append: false
     }) : $.util.noop())
-    .pipe((isProduction && opts.size) ? $.size({
+    .pipe((!isProduction && opts.size) ? $.size({
       title: `Gulp task ${taskname}`,
       showFiles: true
     }) : $.util.noop())