Add dir for tests

Author: alies-dev

composer.json

@@ -9,11 +9,17 @@
     "require": {
         "php": "^8.0"
     },
+    "require-dev": {},
     "autoload": {
         "psr-4": {
             "InteractionDesignFoundation\\NovaUnlayerField\\": "src/"
         }
     },
+    "autoload-dev": {
+        "psr-4": {
+            "Tests\\": "tests/"
+        }
+    },
     "extra": {
         "laravel": {
             "providers": [

src/Unlayer.php

@@ -20,7 +20,7 @@ class Unlayer extends Code
     public $savingCallback;
 
     /** @var string Height of the editor (with units) */
-    public $height = '800px';
+    public string $height = '800px';
 
     /**
      * Specify Unlayer config