Support for Provisioned Concurrency feature

[harleyguru]

As you know, AWS released new feature "Provisioned Concurrency".
Could this component handle it?

[jaylattice]

Should be pretty simple to open a PR. Provisioned concurrency can only be applied to a specific alias for function version. I think the updateFunction method would have to update the latest version with the specified alias, then update the function with that alias with the specified provisioned concurrency.

[hypexr]

I also need this!

[vicary]

There are hidden restrictions on AWS side, but I believe my PR does the job. Please feel free to test it.