Added WordPress 5.8.0 compatibility
- Added WooCommerce 5.6.0 compatibility
- Updated Powerlift Core to 1.3.1
- Updated WPBakery Page Builder to 6.7.0
- Updated Revolution Slider plugin to 6.5.8
- Updated Timetable Responsive Schedule plugin to 6.7
- Fixed creation of Custom Sidebars in widgets section
