Fix value fill.

Author: Liran Cohen

src/Models/CustomField.php

@@ -14,7 +14,6 @@ class CustomField extends Model
     protected $guarded = ['id'];
 
     protected $fillable = [
-        'value', 
         'type', 
         'title', 
         'description', 

src/Models/CustomFieldResponse.php

@@ -7,6 +7,10 @@
 class CustomFieldResponse extends Model
 {
     protected $guarded = ['id'];
+    
+    protected $fillable = [
+        'value',
+    ];
 
     const VALUE_FIELDS = [
         'number'   => 'value_int',