Scope each request

[thetrevdev]

What does this implement/fix? Explain your changes.

Fixes -> https://codesandbox.io/s/purple-star-n3ohc?file=/src/index.js

This scopes the request object to an individual request. This allows for calling a wrapped handler multiple times concurrently. This is useful when trying to reuse individual handlers when batching. Without this a handler may receive the wrong request or return the incorrect response when calling concurrently.

Does this close any currently open issues?

middyjs#558

Any other comments?

This could be considered a breaking change if someone was mutating the handler object intending it to persist between requests.
That being said there would be no reason to store your global state on the handler itself unless you thought it was scoped per request which this implements.

Where has this been tested?

Node.js Versions: 10/12

Middy Versions: 1.2.0

AWS SDK Versions: 2.713.0

Todo list

[x] Feature/Fix fully implemented
[ ] Added tests
[ ] Updated relevant documentation
[ ] Updated relevant examples