build(deps): bump wikimedia/less.php from 3.2.1 to 5.4.0

Bumps [wikimedia/less.php](https://github.com/wikimedia/less.php) from 3.2.1 to 5.4.0.
- [Changelog](https://github.com/wikimedia/less.php/blob/master/CHANGES.md)
- [Commits](wikimedia/less.php@v3.2.1...v5.4.0)

---
updated-dependencies:
- dependency-name: wikimedia/less.php
  dependency-version: 5.4.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

composer.json

@@ -49,7 +49,7 @@
         "react/stream": "^1.3",
         "shardj/zf1-future": "^1.23.5",
         "tedivm/jshrink": "^1.6.8",
-        "wikimedia/less.php": "^3.2.1",
+        "wikimedia/less.php": "^5.4.0",
         "simshaun/recurr": "^5",
         "dragonmantank/cron-expression": "^3",
         "psr/log": "^1"