Adopt the new casts method

Author: duncanmcclean

src/Customers/CustomerModel.php

@@ -16,9 +16,12 @@ class CustomerModel extends Model
 
     protected $guarded = [];
 
-    protected $casts = [
-        'data' => 'json',
-    ];
+    public function casts(): array
+    {
+        return [
+            'data' => 'json',
+        ];
+    }
 
     public function orders(): HasMany
     {

src/Orders/OrderModel.php

@@ -18,18 +18,21 @@ class OrderModel extends Model
 
     protected $guarded = [];
 
-    protected $casts = [
-        'order_number' => 'integer',
-        'items' => 'json',
-        'grand_total' => 'integer',
-        'items_total' => 'integer',
-        'tax_total' => 'integer',
-        'shipping_total' => 'integer',
-        'coupon_total' => 'integer',
-        'use_shipping_address_for_billing' => 'boolean',
-        'gateway' => 'json',
-        'data' => 'json',
-    ];
+    public function casts(): array
+    {
+        return [
+            'order_number' => 'integer',
+            'items' => 'json',
+            'grand_total' => 'integer',
+            'items_total' => 'integer',
+            'tax_total' => 'integer',
+            'shipping_total' => 'integer',
+            'coupon_total' => 'integer',
+            'use_shipping_address_for_billing' => 'boolean',
+            'gateway' => 'json',
+            'data' => 'json',
+        ];
+    }
 
     public function customer(): BelongsTo
     {

src/Orders/StatusLogModel.php

@@ -16,11 +16,14 @@ class StatusLogModel extends Model
 
     protected $guarded = [];
 
-    protected $casts = [
-        'order_id' => 'integer',
-        'timestamp' => 'datetime',
-        'data' => 'json',
-    ];
+    public function casts(): array
+    {
+        return [
+            'order_id' => 'integer',
+            'timestamp' => 'datetime',
+            'data' => 'json',
+        ];
+    }
 
     public function order(): BelongsTo
     {