Edit PHP version constraint and update Composer dependencies

kirby/config/fields/number.php

@@ -24,16 +24,20 @@ return [
 		},
 		/**
 		 * Allowed incremental steps between numbers (i.e `0.5`)
+		 * Use `any` to allow any decimal value.
 		 */
-		'step' => function ($step = null) {
-			return $this->toNumber($step) ?? '';
+		'step' => function ($step = null): float|string {
+			return match ($step) {
+				'any'   => 'any',
+				default => $this->toNumber($step) ?? ''
+			};
 		},
 		'value' => function ($value = null) {
 			return $this->toNumber($value) ?? '';
 		}
 	],
 	'methods' => [
-		'toNumber' => function ($value) {
+		'toNumber' => function ($value): float|null {
 			if ($this->isEmpty($value) === true) {
 				return null;
 			}

kirby/config/fields/select.php

@@ -1,6 +1,7 @@
 <?php
 
 use Kirby\Field\FieldOptions;
+use Kirby\Toolkit\I18n;
 
 return [
 	'extends' => 'radio',
@@ -19,8 +20,8 @@ return [
 		/**
 		 * Custom placeholder string for empty option.
 		 */
-		'placeholder' => function (string $placeholder = '—') {
-			return $placeholder;
+		'placeholder' => function (string|array $placeholder = '—') {
+			return I18n::translate($placeholder, $placeholder);
 		},
 	],
 	'methods' => [