Update phpro/grumphp-shim requirement from ^1.13 to ^2.0

Updates the requirements on [phpro/grumphp-shim](https://github.com/phpro/grumphp-shim) to permit the latest version.
- [Release notes](https://github.com/phpro/grumphp-shim/releases)
- [Commits](phpro/grumphp-shim@v1.13.0...v2.0.0)

---
updated-dependencies:
- dependency-name: phpro/grumphp-shim
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

composer.json

@@ -29,7 +29,7 @@
         "friendsofphp/php-cs-fixer": "^3.48",
         "nunomaduro/collision": "^5.3 || ^6.0",
         "orchestra/testbench": "^6.15",
-        "phpro/grumphp-shim": "^1.13",
+        "phpro/grumphp-shim": "^2.0",
         "phpunit/phpunit": "^9.3",
         "rector/rector": "^0.19.5",
         "roave/security-advisories": "dev-latest",