Bump elliptic from 6.5.2 to 6.5.3 in /test

Bumps [elliptic](https://github.com/indutny/elliptic) from 6.5.2 to 6.5.3.
- [Release notes](https://github.com/indutny/elliptic/releases)
- [Commits](indutny/elliptic@v6.5.2...v6.5.3)

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

Author: dependabot[bot]

test/package.json

@@ -59,7 +59,7 @@
     "chai": "^4.2.0",
     "chai-as-promised": "^7.1.1",
     "crypto-js": "^4.0.0",
-    "elliptic": "^6.5.2",
+    "elliptic": "^6.5.3",
     "foundry-keystore": "^0.1.0",
     "foundry-rpc": "^0.1.2",
     "get-port": "^5.1.1",

test/yarn.lock

@@ -560,10 +560,10 @@ ecc-jsbn@~0.1.1:
     jsbn "~0.1.0"
     safer-buffer "^2.1.0"
 
-elliptic@^6.4.1, elliptic@^6.5.2:
-  version "6.5.2"
-  resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.5.2.tgz#05c5678d7173c049d8ca433552224a495d0e3762"
-  integrity sha512-f4x70okzZbIQl/NSRLkI/+tteV/9WqL98zx+SQ69KbXxmVrmjwsNUPn/gYJJ0sHvEak24cZgHIPegRePAtA/xw==
+elliptic@^6.4.1, elliptic@^6.5.3:
+  version "6.5.3"
+  resolved "https://registry.yarnpkg.com/elliptic/-/elliptic-6.5.3.tgz#cb59eb2efdaf73a0bd78ccd7015a62ad6e0f93d6"
+  integrity sha512-IMqzv5wNQf+E6aHeIqATs0tOLeOTwj1QKbRcS3jBbYkl5oLAserA8yJTT7/VyHUYG91PRmPyeQDObKLPpeS4dw==
   dependencies:
     bn.js "^4.4.0"
     brorand "^1.0.1"