fix: upgrade mathjs from 14.7.0 to 14.8.1

Snyk has created this PR to upgrade mathjs from 14.7.0 to 14.8.1.

See this package in npm:
mathjs

See this project in Snyk:
https://app.snyk.io/org/skanda-bt/project/e932cfb3-7807-490e-9596-755687a7da29?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

math-calculator/package-lock.json

@@ -13,7 +13,7 @@
     "crypto-js": "^4.2.0",
     "decimal.js": "^10.6.0",
     "express": "^5.1.0",
-    "mathjs": "^14.7.0",
+    "mathjs": "^14.8.1",
     "nerdamer": "^1.1.13",
     "readline-sync": "^1.4.10",
     "socket.io": "^4.8.1"