chore(deps-dev): bump serverless from 2.56.0 to 2.57.0

Bumps [serverless](https://github.com/serverless/serverless) from 2.56.0 to 2.57.0.
- [Release notes](https://github.com/serverless/serverless/releases)
- [Changelog](https://github.com/serverless/serverless/blob/master/CHANGELOG.md)
- [Commits](serverless/serverless@v2.56.0...v2.57.0)

---
updated-dependencies:
- dependency-name: serverless
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -74,7 +74,7 @@
     "nyc": "^15.1.0",
     "prettier": "^2.3.2",
     "prettier-eslint-cli": "^5.0.1",
-    "serverless": "^2.56.0",
+    "serverless": "^2.57.0",
     "sinon": "^11.1.2",
     "sinon-chai": "^3.7.0"
   },