fix(deps): update dependency serverless-offline to v13.9.0

Author: renovate[bot]

package.json

@@ -18,7 +18,7 @@
     "aws-xray-sdk": "^3.5.2",
     "bunyan": "^2.0.5",
     "serverless": "^3.35.2",
-    "serverless-offline": "13.5.1",
+    "serverless-offline": "13.9.0",
     "source-map-support": "^0.5.21"
   },
   "devDependencies": {