Bump elliptic from 6.5.7 to 6.6.1 in /cc-implementation

Bumps [elliptic](https://github.com/indutny/elliptic) from 6.5.7 to 6.6.1.
- [Commits](https://github.com/indutny/elliptic/compare/v6.5.7...v6.6.1)

---
updated-dependencies:
- dependency-name: elliptic
  dependency-type: indirect
...

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

cc-implementation/package-lock.json

@@ -1186,9 +1186,9 @@
       }
     },
     "node_modules/elliptic": {
-      "version": "6.5.7",
-      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.7.tgz",
-      "integrity": "sha512-ESVCtTwiA+XhY3wyh24QqRGBoP3rEdDUl3EDUUo9tft074fi19IrdpH7hLCMMP3CIj7jb3W96rn8lt/BqIlt5Q==",
+      "version": "6.6.1",
+      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.6.1.tgz",
+      "integrity": "sha512-RaddvvMatK2LJHqFJ+YA4WysVN5Ita9E35botqIYspQ4TkRAlCicdzKOjlyv/1Za5RyTNn7di//eEV0uTAfe3g==",
       "dev": true,
       "license": "MIT",
       "dependencies": {