Updates clean-css dependency to version 5.1.4.

Author: jakubpawlowicz

CHANGELOG.md

@@ -5,3 +5,6 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+
+### Changed
+- Updates clean-css dependency to version 5.1.4

package-lock.json

@@ -30,7 +30,7 @@
   },
   "dependencies": {
     "bootstrap": "^5.0.1",
-    "clean-css": "^5.1.3",
+    "clean-css": "^5.1.4",
     "file-saver": "^2.0.5",
     "os-browserify": "^0.3.0",
     "path-browserify": "^1.0.1",