Floci usage instead of Localstack (not a bug, just information!)

For anyone looking at [Floci](https://github.com/floci-io/floci) to replace Localstack, I can gladly report that this `serverless-localstack`plugin works fine on Floci too!

The issue contains informational compatibility feedback about the serverless-localstack plugin working with Floci, but names no file, test, or requested change. Start by checking the project's documentation for supported local AWS environments; the work is complete only if this compatibility information has a clear place to be recorded.

Written by the indexing model from the issue text.