Maintenance: End the Response Stream when body is `null` in `#streamHandlerResponse`

[sdangol]

Summary

In the #streamHandlerResponse function , the response stream is not ending the response stream when body is null

Why is this needed?

We should make sure we clean up after ourselves after the stream is started.

Which area does this relate to?

Event Handler

Solution

Add a resStream.end() after resStream.write('') to make sure the stream is ended

Acknowledgment

• This request meets Powertools for AWS Lambda (TypeScript) Tenets
• Should this be considered in other Powertools for AWS Lambda languages? i.e. Python, Java, and .NET

Future readers

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