⬆️ upgrade ws to v8.20.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
ws	8.18.3 → 8.20.0

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Release Notes

websockets/ws (ws)

v8.20.0

Compare Source

Features

• Added exports for the PerMessageDeflate class and utilities for the
  Sec-WebSocket-Extensions and Sec-WebSocket-Protocol headers (d3503c1).

v8.19.0

Compare Source

Features

• Added the closeTimeout option (#​2308).

Bug fixes

• Handled a forthcoming breaking change in Node.js core (1998485).

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