deps(deps): update webmozart/assert requirement from ^1.9 to ^1.12

Updates the requirements on [webmozart/assert](https://github.com/webmozarts/assert) to permit the latest version.
- [Release notes](https://github.com/webmozarts/assert/releases)
- [Changelog](https://github.com/webmozarts/assert/blob/master/CHANGELOG.md)
- [Commits](webmozarts/assert@1.9.0...1.12.1)

---
updated-dependencies:
- dependency-name: webmozart/assert
  dependency-version: 1.12.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

composer.json

@@ -28,7 +28,7 @@
         "symfony/console": "^3.0|^4.0|^5.0|^6.0|^7.0",
         "symfony/polyfill-php80": "^1.20",
         "nikic/php-parser": "~5",
-        "webmozart/assert": "^1.9",
+        "webmozart/assert": "^1.12",
         "ext-json": "*",
         "phpstan/phpdoc-parser": "^1.2|^2.0",
         "ondram/ci-detector": "^4.1"