change gulp task

.travis.yml

@@ -5,7 +5,6 @@ branches:
   only:
   - master
 before_script:
-- npm install
 - npm install -g gulp
 script:
 - gulp lint test

gulpfile.js

@@ -88,8 +88,7 @@ function build() {
 
 // Basic usage
 gulp.task('dev-build', function() {
-        build()
-//        .pipe(uglify())
+        return build()
         .pipe(gulp.dest('./dist/'));
 });