This new release of the CDK brings a couple of interesting updates:
* Update S3 Notifications even if you’re getting the bucket from a lookup.
* AppMesh gets a number of API changes.
* L2 constructs for the AWS::ServiceCatalogAppRegistry resources
* Announcing ‘assertions’, the next revision of the CDK assert module. This module is built via jsii and hence is available in all CDK supported languages.
* lambda-nodejs - using `npm ci` for dependency installs to create a more stable lambda hash.