Bump elliptic and bitpay-sdk

Bumps [elliptic](https://github.com/indutny/elliptic) to 6.6.1 and updates ancestor dependency [bitpay-sdk](https://github.com/bitpay/nodejs-bitpay-client). These dependencies need to be updated together.


Updates `elliptic` from 6.5.4 to 6.6.1
- [Commits](indutny/elliptic@v6.5.4...v6.6.1)

Updates `bitpay-sdk` from 6.0.0 to 6.3.0
- [Release notes](https://github.com/bitpay/nodejs-bitpay-client/releases)
- [Commits](bitpay/nodejs-bitpay-client@6.0.0...6.3.0)

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

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

Author: dependabot[bot]

package-lock.json

@@ -40,7 +40,7 @@
     "typescript-eslint": "8.20.0"
   },
   "dependencies": {
-    "bitpay-sdk": "6.0.0",
+    "bitpay-sdk": "6.3.0",
     "dotenv-flow": "4.1.0",
     "express": "4.21.2",
     "express-winston": "4.2.0",