[Deps] pin elliptic due to a breaking change

See indutny/elliptic#314

Author: ljharb

package.json

@@ -33,7 +33,7 @@
 		"browserify-rsa": "^4.1.0",
 		"create-hash": "^1.2.0",
 		"create-hmac": "^1.1.7",
-		"elliptic": "^6.5.4",
+		"elliptic": "=6.5.1",
 		"inherits": "^2.0.4",
 		"parse-asn1": "^5.1.6",
 		"readable-stream": "^3.6.2",