Bump elliptic from 6.5.1 to 6.5.3 in /examples/wasm_header (#987)

Bumps [elliptic](https://github.com/indutny/elliptic) from 6.5.1 to 6.5.3.
- [Release notes](https://github.com/indutny/elliptic/releases)
- [Commits](https://github.com/indutny/elliptic/compare/v6.5.1...v6.5.3)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

examples/wasm_header/package-lock.json

@@ -1438,9 +1438,9 @@
             "dev": true
         },
         "elliptic": {
-            "version": "6.5.1",
-            "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.1.tgz",
-            "integrity": "sha512-xvJINNLbTeWQjrl6X+7eQCrIy/YPv5XCpKW6kB5mKvtnGILoLDcySuwomfdzt0BMdLNVnuRNTuzKNHj0bva1Cg==",
+            "version": "6.5.3",
+            "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.3.tgz",
+            "integrity": "sha512-IMqzv5wNQf+E6aHeIqATs0tOLeOTwj1QKbRcS3jBbYkl5oLAserA8yJTT7/VyHUYG91PRmPyeQDObKLPpeS4dw==",
             "dev": true,
             "requires": {
                 "bn.js": "^4.4.0",