Bump webmozart/assert from 1.12.1 to 2.1.1 (#104)

Bumps [webmozart/assert](https://github.com/webmozarts/assert) from 1.12.1 to 2.1.1.
- [Release notes](https://github.com/webmozarts/assert/releases)
- [Changelog](https://github.com/webmozarts/assert/blob/master/CHANGELOG.md)
- [Commits](webmozarts/assert@1.12.1...2.1.1)

---
updated-dependencies:
- dependency-name: webmozart/assert
  dependency-version: 2.1.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

composer.json

@@ -17,7 +17,7 @@
         "php": "^8.4",
         "ext-dom": "*",
         "league/commonmark": "^2.3.5",
-        "webmozart/assert": "^1.11",
+        "webmozart/assert": "^2.1",
         "wnx/commonmark-markdown-renderer": "^1.0.2"
     },
     "require-dev": {