fix(deps): update dependency sign-addon to v3.9.0 (#2327)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

package-lock.json

@@ -77,7 +77,7 @@
     "node-notifier": "9.0.0",
     "open": "7.4.2",
     "parse-json": "5.2.0",
-    "sign-addon": "3.8.0",
+    "sign-addon": "3.9.0",
     "source-map-support": "0.5.20",
     "strip-bom": "4.0.0",
     "strip-json-comments": "3.1.1",