Fix dependency vulnerability with nth-check

Fix dependency vulnerability with cssnano -> cssnano-preset-default -> postcss-svgo -> svgo -> css-select -> nth-check. GHSA-rp65-9cf3-cjxr

Author: MelonBall

package.json

@@ -30,7 +30,7 @@
     ]
   },
   "dependencies": {
-    "cssnano": "^4.1.10",
+    "cssnano": "^5.0.8",
     "last-call-webpack-plugin": "^3.0.0"
   },
   "devDependencies": {