chore:(deps): bump bn.js from 5.1.3 to 5.2.0 in /explorer (#15514)

Bumps [bn.js](https://github.com/indutny/bn.js) from 5.1.3 to 5.2.0.
- [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/v5.1.3...v5.2.0)

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

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

explorer/package-lock.json

@@ -4745,9 +4745,9 @@
       "integrity": "sha512-XpNj6GDQzdfW+r2Wnn7xiSAd7TM3jzkxGXBGTtWKuSXv1xUV+azxAm8jdWZN06QTQk+2N2XB9jRDkvbmQmcRtg=="
     },
     "bn.js": {
-      "version": "5.1.3",
-      "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-5.1.3.tgz",
-      "integrity": "sha512-GkTiFpjFtUzU9CbMeJ5iazkCzGL3jrhzerzZIuqLABjbwRaFt33I9tUdSNryIptM+RxDet6OKm2WnLXzW51KsQ=="
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-5.2.0.tgz",
+      "integrity": "sha512-D7iWRBvnZE8ecXiLj/9wbxH7Tk79fAh8IHaTNq1RWRixsS02W+5qS+iE9yq6RYl0asXx5tw0bLhmT5pIfbSquw=="
     },
     "body-parser": {
       "version": "1.19.0",

explorer/package.json

@@ -23,7 +23,7 @@
     "@types/react-select": "^3.1.2",
     "@types/socket.io-client": "^1.4.35",
     "bignumber.js": "^9.0.1",
-    "bn.js": "^5.1.3",
+    "bn.js": "^5.2.0",
     "bootstrap": "^4.6.0",
     "bs58": "^4.0.1",
     "chai": "^4.3.0",