chore(deps): update dependency less to ~4.2.0

Author: renovate[bot]

package.json

@@ -27,7 +27,7 @@
   "devDependencies": {
     "bannerjs": "~2.1.0",
     "csso-cli": "3.0.0",
-    "less": "~4.1.2"
+    "less": "~4.2.0"
   },
   "license": "MIT"
 }