Serverless Stack

I can’t seem to get provisioned concurrency to work:
```            currentVersionOptions: {
              provisionedConcurrentExecutions: 1,
            },```
I made that change to the `sst.Function`, and it results in no changes to the stack :thinking_face:

I think I ran into the same issue a few months back and had to create the version explicitly, since provision concurrency needs an explicit lambda version:
```    const provisionedBaseHandler = new lambda.Alias(
      this,
      'BaseHandlerProvisioned',
      {
        aliasName: 'Provisioned',
        version: baseHandler.currentVersion,
        provisionedConcurrentExecutions: 1,
      }
    );```

This is a bug in CDK: <https://github.com/aws/aws-cdk/issues/13731#issuecomment-814801449>

ugh, not fixed? and it was reported in March?

cool, all I had to do was define the function (`func = new sst.Function(..)`) and then do `func.currentVersion;` after that.