autoprefixer seems to be broken in 1.3.2

[MathiasTim]

I just found out, that the autoprefixer is broken with the current configuration.

I managed to change a few lines so it works now, but I'm not sure about it.
I commented the Filter out and moved the autoprefixer before the sourcemaps.write

Here is my code:

// build styles to tmp
gulp.task('styles', ['clean'], function () {
  // var cssFilter = $.filter(['*.css', '!*.map'], {restore: true});

  // compile css starting from each module's scss
  return gulp.src('app/*/styles/!(_)*.scss')
    .pipe($.plumber())
    .pipe($.sourcemaps.init())
    .pipe($.sass.sync().on('error', $.sass.logError))
    .pipe($.autoprefixer({ browsers: ['last 2 versions'], remove: false}))
    .pipe($.sourcemaps.write('.'))
    // .pipe(cssFilter)
    // .pipe(cssFilter.restore)
    .pipe(gulp.dest('.tmp/'));
});

[gruppjo]

fix according to above fix and this: https://www.npmjs.com/package/gulp-autoprefixer#source-maps