chore(deps): Bump bn.js from 4.12.0 to 4.12.3

Bumps [bn.js](https://github.com/indutny/bn.js) from 4.12.0 to 4.12.3.
- [Release notes](https://github.com/indutny/bn.js/releases)
- [Changelog](https://github.com/indutny/bn.js/blob/master/CHANGELOG.md)
- [Commits](indutny/bn.js@v4.12.0...v4.12.3)

---
updated-dependencies:
- dependency-name: bn.js
  dependency-version: 4.12.3
  dependency-type: indirect
...

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

Author: dependabot[bot]

.yarn/cache/bn.js-npm-4.12.0-3ec6c884f6-10f8db196d.zip

@@ -11056,9 +11056,9 @@ __metadata:
   linkType: hard
 
 "bn.js@npm:^4.0.0, bn.js@npm:^4.1.0, bn.js@npm:^4.11.9":
-  version: 4.12.0
-  resolution: "bn.js@npm:4.12.0"
-  checksum: 10/10f8db196d3da5adfc3207d35d0a42aa29033eb33685f20ba2c36cadfe2de63dad05df0a20ab5aae01b418d1c4b3d4d205273085262fa020d17e93ff32b67527
+  version: 4.12.3
+  resolution: "bn.js@npm:4.12.3"
+  checksum: 10/57ed5a055f946f3e009f1589c45a5242db07f3dddfc72e4506f0dd9d8b145f0dbee4edabc2499288f3fc338eb712fb96a1c623a2ed2bcd49781df1a64db64dd1
   languageName: node
   linkType: hard