Serverless Stack

Missing feature or bug?  The `sst update` and `sst add-cdk` commands are incompatible with NPM (and yarn?) Workspaces. These sst commands need to be run from the package with sst, but with workspaces all NPM commands must be run at the workspace level (with the -w option to specify the target package).

But it only works with yarn 1.0 workspaces

We're in the process of upgrading to cdk 2.0 which will reduce the usefulness of these commands so will probably rework it soon

Okay. I'll just dump the lock files it generated, delete node_modules, and reinstall everything. Bummer, but not fatal.

Just noticed too that I have some explicit @aws-cdk dependencies and `sst update`  didn't update those.

Hold on?! CLI output:
```% npx sst update 0.57.0
Updating @serverless-stack/cli to 0.57.0
Updating @serverless-stack/resources to 0.57.0
Updating @aws-cdk/assert@1.132.0
Updating @aws-cdk/aws-cloudfront@1.132.0
Updating @aws-cdk/cloudformation-include@1.132.0
SST: 0.53.4
CDK: 1.132.0```
Update to 0.57.0 resulted in SST 0.53.4 and CDK 1.132.0?

This was an issue in previous versions of sst update

if you run sst update again it should behave normally

Due to NPM Workspace incompatibility, I'm just doing it manually now.