Bump ws from 0.7.2 to 7.2.1 in /example

[dependabot]

Bumps ws from 0.7.2 to 7.2.1.

Release notes

Sourced from ws's releases.

7.2.1

Bug fixes

• Added bufferutil and utf-8-validate as peer dependencies (#1626).

7.2.0

Features

• Added ability to specify the readableObjectMode option when using
  WebSocket.createWebSocketStream() (#1647).

7.1.2

Bug fixes

• Fixed a bug that caused compress jobs to never be marked as complete
  (#1618).

7.1.1

Bug fixes

• An error is now thrown if the WebSocket server constructor is used
  incorrectly (36412662).

7.1.0

Features

• Added utility to wrap a WebSocket in a Duplex stream (#1589).

Bug fixes

• Reverted "[minor] Remove unneeded if statement" (dbacf582, #1591).

7.0.1

Bug fixes

• Added ability to disable sending the SNI extension (#1587).

7.0.0

Breaking changes

• Dropped support for Node.js 6 (1e6999bb).
• Dropped support for url.Url instances in the WebSocket constructor
  (692d7b47).
• The behavior of WebSocket#{p{i,o}ng,send}() has changed when the
  readyState attribute is not OPEN (#1532)
  • If the readyState attribute is CONNECTING, an exception is thrown.
  • If the readyState attribute is CLOSING or CLOSED
    • The bufferedAmount attribute is increased by the length of the data
      argument in bytes.
    • If provided, the callback function is called with an error.

... (truncated)

Commits

• 9531cd0 [dist] 7.2.1
• a4b9e0b [ci] Test on node 13
• 6df06d9 [minor] Use Infinity if concurrency value is falsy
• 950e41a [minor] Remove async-limiter dependency
• 3293284 [minor] Remove unnecessary optimization
• f06a738 [pkg] Add engines field
• 289724f [pkg] Add bufferutil and utf-8-validate as peer dependencies (#1626)
• 65f7800 [dist] 7.2.0
• 54e3011 [doc] Fix Travis CI URL
• a6c4238 [example] Close the WebSocket connection on logout
• Additional commits viewable in compare view

Maintainer changes

This version was pushed to npm by lpinca, a new releaser for ws since your current version.

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