fix: upgrade serverless from 2.2.0 to 2.3.0

Snyk has created this PR to upgrade serverless from 2.2.0 to 2.3.0.

See this package in npm:
https://www.npmjs.com/package/serverless

See this project in Snyk:
https://app.snyk.io/org/randytarampi/project/e095fb25-a87f-4931-a0ba-08adee4c492b?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -49,7 +49,7 @@
     "mocha-junit-reporter": "^2.0.0",
     "nyc": "^15.1.0",
     "semantic-release": "^17.1.2",
-    "serverless": "^2.2.0",
+    "serverless": "^2.3.0",
     "serverless-mocha-plugin": "^1.12.0",
     "serverless-webpack": "^5.3.5",
     "sinon": "^9.0.3",