v1.8.0

Bug Fixes

• app-delivery: action template filename incorrect (#3986) (f6ef79d), closes #3595
• certificatemanager: increase minimum validation total timeout (#3914) (4973a8c)
• custom-resources: correctly handle booleans conversion (#4000) (77105ab), closes #3933
• dynamodb: prevent "StreamARN not found for resource" errors (#3935) (617ef82)
• ecs: separate application and network load balanced services (#3719) (21eb835)
• events: fromObject handles regular and field tokens together (#3916) (b01f62d), closes #3915
• iam: only attach policies to imported roles if the accounts match (#3716) (87db7aa), closes #2985 #3025

Code Refactoring

• assets: remove content hash attribute (#4003) (181b58b)

Features

• cli: #3971 changed cdk synth to rebuild app (#3972) (198f45f)
• ec2: support configuring network ACLs (#3699) (3f10543), closes #3621
• ecr-assets: fail if tokens are used in buildArgs (#3989) (56ce9ff), closes #3981
• eks: add EKS AMis for 1.14 (#3950) (741ef43)
• eks: spot capacity and bootstrap options (#3937) (5da6b36), closes #3523 #3857 #3929 #3938 #3939
• events: allow passing a role to the CodePipeline target (#4006) (c4054ce), closes #3999

BREAKING CHANGES

• assets: assets no longer expose a property contentHash. Use sourceHash
  as a good approximation. if you have a strong use case for content hashes, please
  raise a github issue and we will figure out a solution.
• dynamodb: fix
• ecs: The LoadBalancedServiceBase, LoadBalancedEc2Service and LoadBalancedFargateService constructs have been separated out into Application and Network LoadBalancedService constructs for both Ec2 and Fargate Services.