Add PHPStan strict rules

Signed-off-by: Maurício Meneghini Fauth <[email protected]>

Author: MauricioFauth

composer.json

@@ -37,8 +37,11 @@
     },
     "require-dev": {
         "phpmyadmin/coding-standard": "^3.0.0",
+        "phpstan/extension-installer": "^1.4",
         "phpstan/phpstan": "^1.12",
+        "phpstan/phpstan-deprecation-rules": "^1.2",
         "phpstan/phpstan-phpunit": "^1.4",
+        "phpstan/phpstan-strict-rules": "^1.6",
         "phpunit/phpunit": "^8.5 || ^9.6 || ^10.5"
     },
     "autoload": {
@@ -54,7 +57,8 @@
     "config":{
         "sort-packages": true,
         "allow-plugins": {
-            "dealerdirect/phpcodesniffer-composer-installer": true
+            "dealerdirect/phpcodesniffer-composer-installer": true,
+            "phpstan/extension-installer": true
         }
     }
 }