Bump elliptic from 6.5.1 to 6.5.4

Bumps [elliptic](https://github.com/indutny/elliptic) from 6.5.1 to 6.5.4.
- [Release notes](https://github.com/indutny/elliptic/releases)
- [Commits](indutny/elliptic@v6.5.1...v6.5.4)

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

Author: dependabot[bot]

package-lock.json

@@ -10,7 +10,7 @@
   "license": "ISC",
   "dependencies": {
     "body-parser": "^1.19.0",
-    "elliptic": "^6.5.1",
+    "elliptic": "^6.5.4",
     "express": "^4.17.1",
     "js-sha256": "^0.9.0",
     "nodemon": "^1.19.3",