chore(deps): bump bn.js and @types/bn.js (#502)

Bumps [bn.js](https://github.com/indutny/bn.js) and [@types/bn.js](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/bn.js). These dependencies needed to be updated together.

Updates `bn.js` from 5.2.1 to 5.2.2
- [Release notes](https://github.com/indutny/bn.js/releases)
- [Changelog](https://github.com/indutny/bn.js/blob/master/CHANGELOG.md)
- [Commits](indutny/bn.js@v5.2.1...v5.2.2)

Updates `@types/bn.js` from 5.1.6 to 5.2.0
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/bn.js)

---
updated-dependencies:
- dependency-name: bn.js
  dependency-version: 5.2.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: "@types/bn.js"
  dependency-version: 5.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -200,8 +200,8 @@
   "homepage": "https://github.com/iExecBlockchainComputing/iexec-sdk#readme",
   "dependencies": {
     "@multiformats/multiaddr": "^12.4.0",
-    "@types/bn.js": "^5.1.6",
-    "bn.js": "^5.2.1",
+    "@types/bn.js": "^5.2.0",
+    "bn.js": "^5.2.2",
     "buffer": "^6.0.3",
     "commander": "^13.1.0",
     "debug": "^4.4.0",