Update phpstan/phpstan requirement from ^0.12.88 || ^1.0.0 to ^0.12.88 || ^1.0.0 || ^2.0.0

---
updated-dependencies:
- dependency-name: phpstan/phpstan
  dependency-version: 2.1.46
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

composer.json

@@ -28,7 +28,7 @@
     "require-dev": {
         "phpunit/phpunit": ">=7.0",
         "phpmd/phpmd": "2.*",
-        "phpstan/phpstan": "^0.12.88 || ^1.0.0",
+        "phpstan/phpstan": "^0.12.88 || ^1.0.0 || ^2.0.0",
         "dompdf/dompdf": "^3.1"
     },
     "suggest": {