fix: upgrade bn.js from 5.2.1 to 5.2.2

Snyk has created this PR to upgrade bn.js from 5.2.1 to 5.2.2.

See this package in npm:
bn.js

See this project in Snyk:
https://app.snyk.io/org/ethan-hurst/project/4947b1d6-abe8-42f2-9ed1-9591b078d909?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot