update kirby

public/kirby/config/fields/mixins/datetime.php

@@ -7,7 +7,7 @@ return [
 		/**
 		 * Defines a custom format that is used when the field is saved
 		 */
-		'format' => function (string $format = null) {
+		'format' => function (string|null $format = null) {
 			return $format;
 		}
 	],

public/kirby/config/fields/mixins/picker.php

@@ -23,7 +23,7 @@ return [
 		/**
 		 * Info text for each item
 		 */
-		'info' => function (string $info = null) {
+		'info' => function (string|null $info = null) {
 			return $info;
 		},
 
@@ -37,14 +37,14 @@ return [
 		/**
 		 * The minimum number of required selected
 		 */
-		'min' => function (int $min = null) {
+		'min' => function (int|null $min = null) {
 			return $min;
 		},
 
 		/**
 		 * The maximum number of allowed selected
 		 */
-		'max' => function (int $max = null) {
+		'max' => function (int|null $max = null) {
 			return $max;
 		},
 
@@ -58,7 +58,7 @@ return [
 		/**
 		 * Query for the items to be included in the picker
 		 */
-		'query' => function (string $query = null) {
+		'query' => function (string|null $query = null) {
 			return $query;
 		},
 
@@ -86,7 +86,7 @@ return [
 		/**
 		 * Main text for each item
 		 */
-		'text' => function (string $text = null) {
+		'text' => function (string|null $text = null) {
 			return $text;
 		},
 	],

public/kirby/config/fields/mixins/upload.php

@@ -74,7 +74,7 @@ return [
 				return $map($file, $parent);
 			});
 		},
-		'uploadParent' => function (string $parentQuery = null) {
+		'uploadParent' => function (string|null $parentQuery = null) {
 			$parent = $this->model();
 
 			if ($parentQuery) {