New features & improvements

• adds support for enhanced context for custom authorizers (94e8c0e, 142aee6, 3a7a9d2). See https://aws.amazon.com/about-aws/whats-new/2016/12/enhanced-context-for-custom-authorizers-in-amazon-api-gateway/
• fixes an error parsing CloudFront configuration in package.json, which caused CF Distributions to always be deployed
• processCFTemplate() has been updated and it cannot be used to add or change Outputs anymore (c25e5bb). It still has access to the full template and can be used to add Resources.
• customTemplateFragment() has been added and can be used to add template Resources and Outputs (but has no access to the template which is being processed) (8b10a11)
• Stage Outputs will now be passed to Lambda via Environment Variables, instead of APIG's stageVariables (8b10a11, 08d6b40). Env Variable name matches Cfn's Output Name prefixed with DAWSON_ (c24c4c4)
• process.env.NODE_ENV is now available in Lambda Functions (86092bf)
• ChangeSets have been dropped due to lack of support for nested templates (fe7e63b)
• the following Cfn Outputs have been removed: ApiGatewayUrl, S3AssetsDNS, CloudFrontDNS, RestApiId, DeploymentId (4547921)
• the following Cfn Outputs have been renamed: S3AssetsBucket -> BucketAssets, WWWDistribution -> DistributionWWW (bc81c61)
• the Account Role for APIGateway has been cleaned up (6b12394)
• x-www-form-urlencoded Content-Type is now supported (6c3fd8f)
• fixes an error in the describe command which broke in an earlier release (0dacca1)
• signs the Cfn Template URL when running with --verbose, for easier debugging (b39bc7f)
• improves dev proxy auto reloading, and adds support for macOS (7892d38, 034e0af, ee91009, a906845, bab2142)
• updates Function's path validation RegExp (bd16ab8)
• a new property fn.excludeEnv has been added which can be used to exclude some Outputs from Lambda's Environment, preventing a Circular Dependencies error between Cfn Resources (c643f0f)
• prints the full stack trace when a Lambda Error is catched (5d208eb)
• adds a --fast flag to dev proxy, which skips cleanup & deps install (0ca139c, 4457ffe)
• fixes a config check which required docker to be present even when not running the dev proxy (4b6c26c)
• when Functions are invoked with a { "__ping": <truthy> }, the whole execution is skipped and "pong__" is returned as response (useful for implementing Lambda keep alive logic, more coming soon)
• Lambda functions now use Resource-based permissions, instead of invocation Roles (6225994)
• updates many dependencies

⚠️️ Breaking changes

• the behaviour of processCFTemplate has been updated, see above
• variables previously accessed as event.stageVariables.abcD must now be accessed by process.env.DAWSON_abcD, see above for details. A codemod can be used to migrate most of the occurrences: event-stagevariables-to-process-env.js
• some implicit Cfn Template Outputs have been removed