Fix gulp task

Author: leaysgur

gulpfile.js

@@ -5,7 +5,7 @@ var espower = require('gulp-espower');
 var mocha   = require('gulp-mocha');
 
 gulp.task('test', function() {
-  gulp.src(['test/**/*.js'])
+  return gulp.src(['test/**/*.js'])
       .pipe(espower())
       .pipe(mocha());
 });