Bump elliptic from 1.0.0 to 6.6.0

Bumps [elliptic](https://github.com/indutny/elliptic) from 1.0.0 to 6.6.0.
- [Commits](https://github.com/indutny/elliptic/compare/v1.0.0...v6.6.0)

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

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

package.json

@@ -31,7 +31,7 @@
   "version": "0.3.2",
   "dependencies": {
     "bs58": "^2.0.0",
-    "elliptic": "=1.0.0",
+    "elliptic": "=6.6.0",
     "secp256k1": "=1.1.5"
   },
   "devDependencies": {