chore(deps): bump wikimedia/less.php from 5.0.0 to 5.1.1

Bumps [wikimedia/less.php](https://github.com/wikimedia/less.php) from 5.0.0 to 5.1.1.
- [Changelog](https://github.com/wikimedia/less.php/blob/master/CHANGES.md)
- [Commits](wikimedia/less.php@v5.0.0...v5.1.1)

---
updated-dependencies:
- dependency-name: wikimedia/less.php
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

composer.json

@@ -89,7 +89,7 @@
         "symfony/validator": "~4.4.34",
         "symfony/web-link": "~4.4.27",
         "voku/anti-xss": "~4.1.41",
-        "wikimedia/less.php": "5.0.0"
+        "wikimedia/less.php": "5.1.1"
     },
     "replace": {
         "paragonie/random_compat": "*",