Expose the aws event

[pdiazvargas]

What

While writing the documentation example I noticed that there are a few fields from the context, that minik is not currently exposing to the caller. For instance the StageVariables, these are values configured at the API Gateway level, that will never get passed in to the view.

This is the documentation of the fields in the event: https://docs.aws.amazon.com/lambda/latest/dg/eventsources.html#eventsources-api-gateway-request

How

Either keep a copy of the original event in the request so that a developer can write something like:

dev view():
    app.request.event.get('stageVariables')

Or implement a refactoring of the request object to load properties on demand.

Why

If a developer has a set of stage variables set and he's not able to access them, using minik would be frustrating.