Update dependency netflux-websocket to v0.1.21

package-lock.json

@@ -1075,9 +1075,9 @@
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     },
     "netflux-websocket": {
-      "version": "0.1.20",
-      "resolved": "https://registry.npmjs.org/netflux-websocket/-/netflux-websocket-0.1.20.tgz",
-      "integrity": "sha512-svFkw4ol4gmkcXKnx5kF/8tR9mmtTCDzUlLy4mSlcNl/4iWlbDmgwp/+aJ3nqtv8fg12m+DAFGX2+fbC0//dcg=="
+      "version": "0.1.21",
+      "resolved": "https://registry.npmjs.org/netflux-websocket/-/netflux-websocket-0.1.21.tgz",
+      "integrity": "sha512-Zjl5lefg8urC0a0T7YCPGiUgRsISZBsTZl1STylmQz8Bq4ohcZ8cP3r6VoCpeVcvJ1Y/e3ZCXPxndWlNP9Jfug=="
     },
     "nthen": {
       "version": "0.1.8",