fix(deps): update dependency selfsigned to v5

Author: renovate[bot]

package.json

@@ -111,7 +111,7 @@
     "launch-editor": "^2.13.1",
     "open": "^11.0.0",
     "p-retry": "^7.1.1",
-    "selfsigned": "^2.4.1",
+    "selfsigned": "^5.5.0",
     "serve-index": "^1.9.2",
     "sockjs": "^0.3.24",
     "spdy": "^4.0.2",