Log Message:
py-moto: updated to 1.1.19

Note: versions >= 1.1.20 require py-docker

1.1.19
* Fixing regression from 1.1.15

1.1.15
* Polly implementation
* Added EC2 instance info
* SNS publish by phone number

1.1.14
* ACM implementation
* Added `make scaffold`
* X-Ray implementation

1.1.13
* Created alpine-based Dockerfile (dockerhub: motoserver/moto)
* SNS.SetSMSAttributes & SNS.GetSMSAttributes + Filtering
* S3 ACL implementation
* pushing to Dockerhub on `make publish`

1.1.12
* implemented all AWS managed policies in source
* fixing Dynamodb CapacityUnits format
* S3 ACL implementation

1.1.11
* S3 authentication
* SSM get_parameter
* ELBv2 target group tagging
* EC2 Security group filters