chore: bump xmlhttprequest-ssl version

Related:

- https://snyk.io/vuln/SNYK-JS-XMLHTTPREQUESTSSL-1255647
- https://snyk.io/vuln/SNYK-JS-XMLHTTPREQUESTSSL-1082936
- https://www.npmjs.com/advisories/1665
- #676

Author: darrachequesne

package.json

@@ -33,7 +33,7 @@
     "parseqs": "0.0.5",
     "parseuri": "0.0.5",
     "ws": "~6.1.0",
-    "xmlhttprequest-ssl": "~1.5.4",
+    "xmlhttprequest-ssl": "~1.6.3",
     "yeast": "0.1.2"
   },
   "devDependencies": {