Update dependency doctrine/coding-standard to v14 (#1033)

* Update dependency doctrine/coding-standard to v14

| datasource | package                  | from   | to     |
| ---------- | ------------------------ | ------ | ------ |
| packagist  | doctrine/coding-standard | 13.0.1 | 14.0.0 |

* Drop explicitely unused dep

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Filippo Tessarotto <[email protected]>

Author: renovate[bot]

composer.json

@@ -52,12 +52,11 @@
         "ext-pcntl": "*",
         "ext-pcov": "*",
         "ext-posix": "*",
-        "doctrine/coding-standard": "^13.0.1",
+        "doctrine/coding-standard": "^14.0.0",
         "phpstan/phpstan": "^2.1.29",
         "phpstan/phpstan-deprecation-rules": "^2.0.3",
         "phpstan/phpstan-phpunit": "^2.0.7",
         "phpstan/phpstan-strict-rules": "^2.0.7",
-        "squizlabs/php_codesniffer": "^3.13.4",
         "symfony/filesystem": "^6.4.13 || ^7.3.2"
     },
     "autoload": {