Bump ws from 5.2.2 to 7.2.1

[dependabot-preview]

Bumps ws from 5.2.2 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

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)
• @dependabot use these labels will set the current labels as the default for future PRs for this repo and language
• @dependabot use these reviewers will set the current reviewers as the default for future PRs for this repo and language
• @dependabot use these assignees will set the current assignees as the default for future PRs for this repo and language
• @dependabot use this milestone will set the current milestone as the default for future PRs for this repo and language
• @dependabot badge me will comment on this PR with code to add a "Dependabot enabled" badge to your readme

Additionally, you can set the following in your Dependabot dashboard:

• Update frequency (including time of day and day of week)
• Pull request limits (per update run and/or open at any time)
• Automerge options (never/patch/minor, and dev/runtime dependencies)
• Out-of-range updates (receive only lockfile updates, if desired)
• Security updates (receive only security updates, if desired)

[dependabot-preview]

Superseded by #43.