chore: Bump jest in /modules/webhook/lambdas/webhook (#130)

Bumps [jest](https://github.com/facebook/jest) from 26.2.2 to 26.4.0.
- [Release notes](https://github.com/facebook/jest/releases)
- [Changelog](https://github.com/facebook/jest/blob/master/CHANGELOG.md)
- [Commits](jestjs/jest@v26.2.2...v26.4.0)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

modules/webhook/lambdas/webhook/package.json

@@ -19,7 +19,7 @@
     "aws-sdk": "^2.734.0",
     "body-parser": "^1.19.0",
     "express": "^4.17.1",
-    "jest": "^26.2.2",
+    "jest": "^26.4.0",
     "ts-jest": "^26.1.4",
     "ts-node-dev": "^1.0.0-pre.56",
     "typescript": "^3.9.6"