New AWS Runtime Support
Added support for following runtime testing:
- Java 11
- Python 3.8
- Ruby 2.5
- Ruby 2.7
- NodeJS 10.x
Also:
- Updating serverless to 1.64.0 from 1.60.5
- Updating warm-start test schedule to be a 15-minute series ever 4 hours, rather than 3 minutes every hour to give smoother results more tolerant of spikes.
- Refactoring and cleanup of aws-test and aws-common stacks