mattdelaf

Added support for multiple header value in API Gateway

4

Last October AWS [announced support for multi-value headers](https://aws.amazon.com/fr/about-aws/whats-new/2018/10/amazon-api-gateway-adds-support-for-multi-parameters/). Since version [1.8.1](https://github.com/aws/aws-lambda-go/tree/v1.8.1), `aws-lambda-go` package events supports multi-value headers as `map[string][]string`. This is particularly useful for setting multiple cookies. This is a...