chore(deps): bump bn.js from 5.0.0 to 5.1.1

Bumps [bn.js](https://github.com/indutny/bn.js) from 5.0.0 to 5.1.1.
- [Release notes](https://github.com/indutny/bn.js/releases)
- [Changelog](https://github.com/indutny/bn.js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/indutny/bn.js/compare/v5.0.0...v5.1.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

web3.js/package-lock.json

@@ -7507,9 +7507,9 @@
       "dev": true
     },
     "bn.js": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-5.0.0.tgz",
-      "integrity": "sha512-bVwDX8AF+72fIUNuARelKAlQUNtPOfG2fRxorbVvFk4zpHbqLrPdOGfVg5vrKwVzLLePqPBiATaOZNELQzmS0A=="
+      "version": "5.1.1",
+      "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-5.1.1.tgz",
+      "integrity": "sha512-IUTD/REb78Z2eodka1QZyyEk66pciRcP6Sroka0aI3tG/iwIdYLrBD62RsubR7vqdt3WyX8p4jxeatzmRSphtA=="
     },
     "boolbase": {
       "version": "1.0.0",