chore: update dependency ws to ^8.20.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
ws	^8.19.0 → ^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).

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