fix: remove SIGWINCH listener upon closing the REPL

[Snehil-Shah]

Description

What is the purpose of this pull request?

This pull request:

• Removes SIGWINCH event listener when the REPL is closed to avoid dangling instances in [process]
• Fixes:
  

Questions

Any questions for reviewers of this pull request?

I am a bit confused. Should we also remove all other listeners (like 'SIGINT' events etc) in onClose() or are they automatically removed?

Other

Any other information relevant to this pull request? This may include screenshots, references, and/or implementation notes.

No.

Checklist

Please ensure the following tasks are completed before submitting this pull request.

• Read, understood, and followed the contributing guidelines.

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@stdlib-js/reviewers

[kgryte]

LGTM.

[kgryte]

I am a bit confused. Should we also remove all other listeners (like 'SIGINT' events etc) in onClose() or are they automatically removed?

No need to remove the rli listeners, as the rli instance is garbage collected along with the REPL. For istream, this may live longer than the REPL instance, and the proc most certainly so. In the latter cases, it makes sense to clean up after ourselves to avoid holding on to function/callback references.