bump version

Former-commit-id: d610d8b6016ab9a9aa879e2e95c4d426efe614c1

manifest.json

@@ -8,7 +8,7 @@
 		"64": "extension/ui/resources/icon_64.png",
 		"128": "extension/ui/resources/icon_128.png"
 	},
-	"version": "1.13.30",
+	"version": "1.13.31",
 	"description": "__MSG_extensionDescription__",
 	"content_scripts": [
 		{