Update dependency ws to v6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	References
ws	dependencies	major	4.1.0 -> 6.2.0	source
@​types/ws	devDependencies	major	4.0.2 -> 6.0.1	source
ws	dependencies	minor	6.1.4 -> 6.2.0	source
@​types/ws	devDependencies	major	3.2.1 -> 6.0.1	source

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Release Notes

websockets/ws

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).

v6.0.0

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Breaking changes

• Dropped support for Node.js 4 (d73885c).
• Added a shim that throws an error when used if the package is bundled for the
  browser (#​1345).
• Added a maxPayload option on the client. Defaults to 100 MiB (#​1402).
• Dropped support for the memLevel and level options. Use
  zlibDeflateOptions instead. (80e2002).

v5.2.2

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Bug fixes

• Fixed a use after invalidation bug introduced in 6046a28 (8aba871).

v5.2.1

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Bug fixes

• Fixed a bug that could prevent buffered data from being processed under
  certain circumstances (6046a28).

v5.2.0

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Features

• Added ability to specify custom headers when rejecting the handshake (#​1379).

v5.1.1

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Bug fixes

• Fixed a regression introduced in 9e152f9 (#​1347).

v5.1.0

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Features

• The address argument of the WebSocket constructor can now be a URL
  instance (#​1329).
• The options argument of the WebSocket constructor now accepts any TLS
  option that is also accepted by https.request() (#​1332).

v5.0.0

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Breaking changes

• Dropped support for Node.js < 4.5.0 (#​1313).
• The connection is no longer closed if the server does not agree to any of
  the client's requested subprotocols (#​1312).
• net.Socket errors are no longer re-emitted (a4050db).

Features

• Read backpressure is now properly handled when permessage-deflate is enabled
  (#​1302).

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[coveralls]

Pull Request Test Coverage Report for Build 2002

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 93.696%

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Totals
Change from base Build 1997:	0.0%
Covered Lines:	2996
Relevant Lines:	3141

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💛 - Coveralls

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