Bug Fixes
========

* **aws-autoscaling:** allow minSize to be set to 0 ([#1015](#1015)) ([67f7fa1](67f7fa1))
* **aws-codebuild:** correctly pass the timeout property to CFN when creating a Project. ([#1071](#1071)) ([b1322bb](b1322bb))
* **aws-codebuild:** correctly set S3 path when using it as artifact. ([#1072](#1072)) ([f32cba9](f32cba9))
* **aws-kms:** add output value when exporting an encryption key ([#1036](#1036)) ([cb490be](cb490be))
* Switch from `js-yaml` to `yaml` ([#1092](#1092)) ([0b132b5](0b132b5))

Features
========

* don't upload the same asset multiple times ([#1011](#1011)) ([35937b6](35937b6)), closes [#989](#989)
* **app-delivery:** CI/CD for CDK Stacks ([#1022](#1022)) ([f2fe4e9](f2fe4e9))
* add a new construct library for ECS ([#1058](#1058)) ([ae03ddb](ae03ddb))
* **applets:** integrate into toolkit ([#1039](#1039)) ([fdabe95](fdabe95)), closes [#849](#849) [#342](#342) [#291](#291)
* **aws-codecommit:** use CloudWatch Events instead of polling by default in the CodePipeline Action. ([#1026](#1026)) ([d09d30c](d09d30c))
* **aws-dynamodb:** allow specifying partition/sort keys in props ([#1054](#1054)) ([ec87331](ec87331)), closes [#1051](#1051)
* **aws-ec2:** AmazonLinuxImage supports AL2 ([#1081](#1081)) ([97b57a5](97b57a5)), closes [#1062](#1062)
* **aws-lambda:** high level API for event sources ([#1063](#1063)) ([1be3442](1be3442))
* **aws-sqs:** improvements to IAM grants API ([#1052](#1052)) ([6f2475e](6f2475e))
* **codepipeline/cfn:** Use fewer statements for pipeline permissions ([#1009](#1009)) ([8f4c2ab](8f4c2ab))
* **pkglint:** Make sure .snk files are ignored ([#1049](#1049)) ([53c8d76](53c8d76)), closes [#643](#643)
* **toolkit:** deployment ui improvements ([#1067](#1067)) ([c832eaf](c832eaf))
* Update to CloudFormation resource specification v2.11.0

BREAKING CHANGES
========

* The ec2.Connections object has been changed to be able to manage multiple
  security groups. The relevant property has been changed from `securityGroup`
  to `securityGroups` (an array of security group objects).
* **aws-codecommit:** this modifies the default behavior of the CodeCommit
  Action.  It also changes the internal API contract between the
  aws-codepipeline-api module and the CodePipeline Actions in the service
  packages.
* **applets:** The applet schema has changed to allow Multiple applets can be
  define in one file by structuring the files like this:
* **applets:** The applet schema has changed to allow definition of multiple
  applets in the same file.

The schema now looks like this:

    applets:
      MyApplet:
        type: ./my-applet-file
        properties:
          property1: value
          ...
By starting an applet specifier with npm://, applet modules can directly be
referenced in NPM. You can include a version specifier (@1.2.3) to reference
specific versions.
* **aws-sqs:** `queue.grantReceiveMessages` has been removed. It is unlikely
  that this would be sufficient to interact with a queue. Alternatively you can
  use `queue.grantConsumeMessages` or `queue.grant('sqs:ReceiveMessage')` if
  there's a need to only grant this action.