Bump PHPStan to v1.2

Signed-off-by: Maurício Meneghini Fauth <mauricio@fauth.dev>

Author: MauricioFauth

Diff for: composer.json

@@ -22,9 +22,9 @@
     "require-dev": {
         "phpmyadmin/coding-standard": "^3.0",
         "phpmyadmin/motranslator": "^4.0 || ^5.0",
-        "phpstan/extension-installer": "^1.0",
-        "phpstan/phpstan": "^0.12.98",
-        "phpstan/phpstan-phpunit": "^0.12.16",
+        "phpstan/extension-installer": "^1.1",
+        "phpstan/phpstan": "^1.2",
+        "phpstan/phpstan-phpunit": "^1.0",
         "phpunit/php-code-coverage": "*",
         "phpunit/phpunit": "^7.5 || ^8.5 || ^9.5",
         "psalm/plugin-phpunit": "^0.16.1",