We use both GitHub's built in vulnerability scanner as well as a third-party one snyk.io and there seems to be a few issues with the latest version.
https://app.snyk.io/test/npm/cfn-lambda/2.1.3
Is there a specific reason you are including aws-sdk into this bundle? Is it not good enough to lock the API versions in the code and then let it inherit the module from AWS lambda natively? Seems like that would clear up a number of issues.