Update dependency Polyfill to 11.4.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
Polyfill	11.4.0 → 11.4.1

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Release Notes

SimonCropp/Polyfill (Polyfill)

v11.4.1

Compare Source

• #​612 Fix ReadAllLines disposing signal while handler still running

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