build(deps-dev): bump elliptic from 6.5.3 to 6.5.4

Bumps [elliptic](https://github.com/indutny/elliptic) from 6.5.3 to 6.5.4.
- [Release notes](https://github.com/indutny/elliptic/releases)
- [Commits](indutny/elliptic@v6.5.3...v6.5.4)

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

package.json

@@ -45,7 +45,7 @@
     "@types/jasminewd2": "~2.0.3",
     "@types/node": "^12.11.1",
     "codelyzer": "^6.0.0",
-    "elliptic": "^6.5.3",
+    "elliptic": "^6.5.4",
     "jasmine-core": "~3.6.0",
     "jasmine-spec-reporter": "~5.0.0",
     "karma": "^6.1.1",