[chore] bump xmlhttprequest-ssl to fix CVE

Author: jodonnell

package.json

@@ -33,7 +33,7 @@
     "parseqs": "0.0.5",
     "parseuri": "0.0.5",
     "ws": "~1.1.5",
-    "xmlhttprequest-ssl": "1.5.3",
+    "xmlhttprequest-ssl": "1.6.3",
     "yeast": "0.1.2"
   },
   "devDependencies": {