v1.12.0

Bug Fixes

• apigateway: defaultChild on RestApi returns the underlying L1 (#4318) (53db8bc), closes #3234
• cloudmap: fix CloudMap Service import, expose ECS CloudMap Service (#4313) (c968c96), closes #4286
• codebuild: validate if a CodePipeline action that is cross-account does not have outputs (#4171) (1744f8a), closes #4032
• custom-resources: support region for AwsCustomResource (#4298) (934d36f), closes #4292
• ecr-assets: exclude option (#4354) (f96b2fb), closes #4353 #4353
• ecs: nat network mode for windows tasks (#4317) (9ceb995), closes #4272
• lambda-event-sources: add missing export of streams.ts (#4362) (032b70c), closes #4352

Features

• cloudformation: nested stacks (#2821) (5225306), closes #239 #395 #3437 #1439 #3463
• ecs: add a new API for registering ECS targets (#4212) (de84c4a)
• ecs: add support for ProxyConfiguration in ECS TaskDefinition (#4007) (68e1e85)
• ecs: Add warning message when pulling ECR image (#4334) (bd36c6c)
• ecs-patterns: add CloudMapOptions to load balanced services (#4369) (de0a028)
• rds: add support for monitoring to database cluster (#2828) (910c8bf), closes #2826
• stepfunctions: add support for Map state (#4145) (c8f0bcf)

BREAKING CHANGES

• cloudmap: cloudmap.Service.fromServiceAttributes takes a newly
  required argument namespace.