Merge pull request #273 - webform, better_exposed_filters, jquery stuff

Updating drupal/webform (5.12.0 => 5.18.0)
Updating drupal/better_exposed_filters (3.0-alpha6 => 5.0.0-beta1)
better_exposed_filters installed following
- Installing drupal/jquery_ui_touch_punch (1.0.0)
- Installing drupal/jquery_ui_slider (1.1.0)
- Installing drupal/jquery_ui_datepicker (1.0.0)
- Installing drupal/jquery_ui (1.4.0)
Removing better_exposed_filters patch