support for HTTP api gateway

[shashank-sachan]

Issue #, if available:

Description of changes:

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[codecov-io]

Codecov Report

Merging #274 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #274   +/-   ##
=======================================
  Coverage   74.63%   74.63%           
=======================================
  Files          20       20           
  Lines         682      682           
=======================================
  Hits          509      509           
  Misses        128      128           
  Partials       45       45

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[shashank-sachan]

Renamed the struct to APIGatewayV2Request

[bmoffatt]

This change should also have a simple de-serialization test case with sample data in https://github.com/aws/aws-lambda-go/blob/master/events/apigw_test.go

There's a sample payload in the docs

[shashank-sachan]

Added test case

[shashank-sachan]

@bmoffatt Is the next release version come soon with these changes or there is an schedule date for release?

[bmoffatt]

@shashank-sachan i've released this change today as v1.16.0 - Enjoy!

[shashank-sachan]

@shashank-sachan i've released this change today as v1.16.0 - Enjoy!

Thanks @bmoffatt