chore: bump ws dependency

Diff: websockets/ws@6.1.0...7.2.1

Author: darrachequesne

package-lock.json

@@ -31,7 +31,7 @@
     "indexof": "0.0.1",
     "parseqs": "0.0.5",
     "parseuri": "0.0.5",
-    "ws": "~6.1.0",
+    "ws": "~7.2.1",
     "xmlhttprequest-ssl": "~1.5.4",
     "yeast": "0.1.2"
   },