composer update + load more dev dependencies for code quality, checkstyle fix

composer.json

@@ -9,11 +9,14 @@
         "dereuromark/cakephp-tools": "^3.9",
         "muffin/trash": "^4.2",
         "cakephp/cakephp": "^5.0.1",
-        "bentools/cartesian-product": "dev-master"
+        "bentools/cartesian-product": "^2.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^10.1",
-        "cakephp/migrations": "^4.0.0"
+        "cakephp/migrations": "^4.0.0",
+        "cakedc/cakephp-phpstan": "^4.1",
+        "dereuromark/composer-prefer-lowest": "^0.1.10",
+        "fig-r/psr2r-sniffer": "^2.7"
     },
     "suggest": {
         "hi-powered-dev/cake-carts": "Allow users to add products/SKUs to a cart"
@@ -29,5 +32,22 @@
             "Cake\\Test\\": "vendor/cakephp/cakephp/tests/",
             "TestApp\\": "tests/test_app/src/"
         }
+    },
+    "scripts": {
+        "check": [
+            "@test",
+            "@cs-check"
+        ],
+        "test": "phpunit --colors=always",
+        "cs-check": "vendor/bin/phpcs --colors",
+        "cs-fix": "vendor/bin/phpcbf --colors",
+        "lowest": "validate-prefer-lowest",
+        "lowest-setup": "composer update --prefer-lowest --prefer-stable --prefer-dist --no-interaction && cp composer.json composer.backup && composer require --dev dereuromark/composer-prefer-lowest && mv composer.backup composer.json",
+        "stan": "phpstan analyze"
+    },
+    "config": {
+        "allow-plugins": {
+            "dealerdirect/phpcodesniffer-composer-installer": true
+        }
     }
 }