fix: Updated sign-addon to version 0.3.1

Author: rpl

package.json

@@ -72,7 +72,7 @@
     "parse-json": "4.0.0",
     "regenerator-runtime": "0.11.1",
     "require-uncached": "1.0.3",
-    "sign-addon": "0.3.0",
+    "sign-addon": "0.3.1",
     "source-map-support": "0.5.3",
     "stream-to-promise": "2.2.0",
     "strip-json-comments": "2.0.1",