Update: laravel 8 to 12, php 7.3 to php 8.3, Jenkinsfile, Unit/Feature testing, vapor, docker

app/Models/KeyValuePair.php

@@ -8,8 +8,6 @@ class KeyValuePair extends AbstractModel
 {
     use SoftDeletes;
 
-    protected $dates = ['deleted_at'];
-
     protected $table = 'key_value_pairs';
 
     protected $fillable = [
@@ -19,6 +17,18 @@ class KeyValuePair extends AbstractModel
         'value',
     ];
 
+    /**
+     * Get the attributes that should be cast.
+     *
+     * @return array<string, string>
+     */
+    protected function casts(): array
+    {
+        return [
+            'deleted_at' => 'datetime',
+        ];
+    }
+
     public function owner(): MorphTo
     {
         return $this->morphTo();