Update dependency ws to v6.2.2

[dev-mend-for-jackfan.us.kg]

This PR contains the following updates:

Package	Type	Update	Change
ws	dependencies	minor	6.0.0 -> 6.2.2

By merging this PR, the issue #11 will be automatically resolved and closed:

Severity	CVSS Score	CVE	Reachability
Medium	5.3	CVE-2021-32640

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Release Notes

websockets/ws (ws)

v6.2.2

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Bug fixes

• Backported 00c425e to the 6.x release line (78c676d).

v6.2.1

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Bug fixes

• Fixed a bug that, under certain circumstances, prevented the close timer from
  being set (aa1dcd5).

v6.2.0

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Features

• Added ability to follow redirects (#​1490).

Bug fixes

• The opening handshake is now aborted if the Sec-WebSocket-Key header field
  value is invalid (160af45).

v6.1.4

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Bug fixes

• Fixed an issue that caused the Host header to always include a port (#​1510).

v6.1.3

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Bug fixes

• Fixed a bug that, under certain circumstances, prevented the close frame from
  being parsed (#​1494).

v6.1.2

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Bug fixes

• Restored compatibility with Node.js < 6.13.0 (26436e0).

v6.1.1

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Bug fixes

• Queued messages to send are now discarded if the permessage-deflate is enabled
  and the socket closes prematurely (#​1464, #​1471).

v6.1.0

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Features

• The WebSocket server now emits a 'close' event when the server
  closes (#​1453).

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