chore: add @middy/core v6 as peer dependency

[anthony-nhs]

Summary

Changes

Please provide a summary of what's being changed
This PR adds @middy/core v6 as a peer dependency

You can not use @powertools-lambda-typescript and @middy/core v6

Please add the issue number below, if no issue is present the PR might get blocked and not be reviewed

Issue number: Closes #3367

---

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

Disclaimer: We value your time and bandwidth. As such, any pull requests created on non-triaged issues might not be successful.

[boring-cyborg]

Thanks a lot for your first contribution! Please check out our contributing guidelines and don't hesitate to ask whatever you need.
In the meantime, check out the #typescript channel on our Powertools for AWS Lambda Discord: Invite link

[dreamorosi]

Thank you for opening this PR.

I don't think doubling the amount of tests we run only to add Middy.js is the way to go as this doubles or more our feedback loop.

I would propose to instead use Middy.js v6 to this test only, plus one that we will add in a future PR for the Metrics utility.

This way we'll have a somewhat even distribution of tests running v4, v5, and v6 without having to repeat tests.

[anthony-nhs]

ok - have changed it so that only one test is changed to use middy v6

[dreamorosi]

Thank you for addressing the comment.

Tomorrow morning (EU time) I'll run some more in depth manual tests and familiarize myself with the changes in v6.

If there's no blocker and CI is green I'll merge this PR so that the change can land in the next release.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[dreamorosi]

Thank you for your patience.

I ran the end to end tests on this branch and they're green.

I also looked at the v6 release notes and commit history, and there seems not to be any breaking change in the core module that would affect us.

I'm happy to merge this as-is and update the docs later.

[boring-cyborg]

Awesome work, congrats on your first merged pull request and thank you for helping improve everyone's experience!

[github-actions]

@aws-powertools/lambda-typescript No related issues found. Please ensure 'pending-release' label is applied before releasing.