Add MinimumCompressionSize setting for AWS::Serverless::Api

[n3ziniuka5]

This setting is available for AWS::ApiGateway::RestApi. Would be very useful to have it for AWS::Serverless::Api

AWS::ApiGateway::RestApi docs - https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-apigateway-restapi.html

[digioak-zz]

Our API Gateway model https://github.com/awslabs/serverless-application-model/blob/a09929bcdd7cd6083d5c344ce5a64208a56bc4a6/samtranslator/model/apigateway.py doesn't support this attribute at the moment. If you are comfortable with submitting a PR that adds support for this attribute, that would be great! In the meantime, a workaround that you may already be doing is patching the generated swagger definition with this attribute added.

[keetonian]

Released!