Update dependency sass to v1.54.2

package.json

@@ -11,7 +11,7 @@
     "gulp-uglify": "3.0.2",
     "gulp-useref": "5.0.0",
     "node-sass": "7.0.1",
-    "sass": "1.54.0",
+    "sass": "1.54.2",
     "gulp-sass": "5.1.0"
   }
 }