Has vulnerable/deprecated packages (aws-appsync-codegen replaced by amplify-codegen)

[cnorthwood]

This package depends on aws-appsync-codegen which is listed as deprecated and replaced by aws-amplify. For some reason that repo has a dated version jest-cli as a runtime (rather than dev) dependency which brings in a bunch of vulnerable dependencies (related to #28). With that package now deprecated, it seems unlikely this will get fixed, so I wonder if this package needs updating to use the new replacement library?