Update elliptic version in package.json

Author: AnthonyZavala

package.json

@@ -581,10 +581,10 @@
   },
   "overrides": {
     "browserify-sign": {
-      "elliptic": "6.5.7"
+      "elliptic": "6.6.0"
     },
     "create-ecdh": {
-      "elliptic": "6.5.7"
+      "elliptic": "6.6.0"
     }
   }
 }