Update symplify/easy-coding-standard requirement || ^12.0

Updates the requirements on [symplify/easy-coding-standard](https://github.com/easy-coding-standard/easy-coding-standard) to permit the latest version.
- [Release notes](https://github.com/easy-coding-standard/easy-coding-standard/releases)
- [Commits](easy-coding-standard/easy-coding-standard@11.3.0...12.0.6)

---
updated-dependencies:
- dependency-name: symplify/easy-coding-standard
  dependency-type: direct:development
...

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

composer.json

@@ -23,7 +23,7 @@
     },
     "require-dev": {
         "phpstan/phpstan": "^1.10",
-        "symplify/easy-coding-standard": "^11.3"
+        "symplify/easy-coding-standard": "^11.3 || ^12.0"
     },
     "autoload": {
         "psr-4": {