Make the auction start price and auction dates required for vendors

/* WCV - Require auction start price and auction dates */

function wcv_make_field_required( $field ) {

	$field['custom_attributes']['required']                      = 'required';

	$field['custom_attributes']['data-parsley-required-message'] = __( 'This field is required.', 'wc-vendors' );

	return $field;

}

add_filter( 'wcv_simple_auctions_end_date', 'wcv_make_field_required' );

add_filter( 'wcv_simple_auctions_start_date', 'wcv_make_field_required' );

add_filter( 'wcv_simple_auctions_start_price', 'wcv_make_field_required' );