Bump elliptic and ethers

Removes [elliptic](https://github.com/indutny/elliptic). It's no longer used after updating ancestor dependency [ethers](https://github.com/ethers-io/ethers.js). These dependencies need to be updated together.


Removes `elliptic`

Updates `ethers` from 5.7.2 to 6.13.4
- [Release notes](https://github.com/ethers-io/ethers.js/releases)
- [Changelog](https://github.com/ethers-io/ethers.js/blob/main/CHANGELOG.md)
- [Commits](https://github.com/ethers-io/ethers.js/compare/v5.7.2...v6.13.4)

---
updated-dependencies:
- dependency-name: elliptic
  dependency-type: indirect
- dependency-name: ethers
  dependency-type: direct:production
...

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

package.json

@@ -14,7 +14,7 @@
     "type-check": "tsc --noEmit"
   },
   "dependencies": {
-    "ethers": "^5.7.2"
+    "ethers": "^6.13.4"
   },
   "devDependencies": {
     "@types/chai": "^4.3.5",