Upgrade gzip-size to version 6

Author: realityking

package-lock.json

@@ -41,7 +41,7 @@
     "ejs": "^3.1.5",
     "express": "^4.17.1",
     "filesize": "^6.1.0",
-    "gzip-size": "^5.1.1",
+    "gzip-size": "^6.0.0",
     "lodash": "^4.17.20",
     "opener": "^1.5.2",
     "ws": "^7.3.1"