fix(deps): update dependency gzip-size to v7

Author: renovate[bot]

core/package.json

@@ -27,7 +27,7 @@
     "css-minimizer-webpack-plugin": "~3.4.1",
     "filesize": "^8.0.7",
     "fs-extra": "^11.2.0",
-    "gzip-size": "6",
+    "gzip-size": "7",
     "kkt": "^7.5.3",
     "minimist": "^1.2.8",
     "react-dev-utils": "^12.0.1",