Compatibility fix for WooCommerce Bookings

When using this Plugin together with Woocommerce Bookings I ran into a few compatibility issues, but managed to fix them. I just wanted to share my findings here:

File woo-wulti-currency/plugins/woocommerce_bookings.php starting at line 31:

	public function woocommerce_bookings_calculated_booking_cost_success_output( $output, $display_price, $product ) {
		$posted = array();
// This removes characters from wc_bookings_field_start_date_time which results in wrong year being parsed
//		parse_str( sanitize_text_field( $_POST['form'] ), $posted );
		parse_str( $_POST['form'], $posted );
// WC_Booking_Form::calculate_booking_cost() is deprecated and causes a Notice with debug on.
//		$booking_form = new WC_Booking_Form( $product );
//		$cost         = $booking_form->calculate_booking_cost( $posted );
		$data = wc_bookings_get_posted_data( $posted, $product );
		$cost = WC_Bookings_Cost_Calculation::calculate_booking_cost( $data, $product );

		if ( is_wp_error( $cost ) ) {
			wp_send_json( array(
				'result' => 'ERROR',
// THIS FILTER CAUSES A LOOP!
//				'html'   => apply_filters( 'woocommerce_bookings_calculated_booking_cost_success_output', '<span class="booking-error">' . $cost->get_error_message() . '</span>', $cost, $product ),
				'html'   => '<span class="booking-error">' . $cost->get_error_message() . '</span>',
//				),
			) );
		}
	[...]