Remove eslint.failAfterError()

In case of eslint error eslint.failAfterError() didn't let csslint to
finish. With removing eslint.failAfterError() both tasks run in
parallel and finish.

Signed-off-by: Alfredos-Panagiotis Damkalis <fredy@fredy.gr>

gulpfile.js

@@ -16,8 +16,7 @@ gulp.task('js:lint', function() {
 
     return gulp.src(lintPathsJS)
         .pipe(eslint())
-        .pipe(eslint.format())
-        .pipe(eslint.failAfterError());
+        .pipe(eslint.format());
 });
 
 gulp.task('css:lint', function() {