- Add flowchart for handling ready-to-merge pull requests

- Add diagram guidelines

Many thanks to Sean Molenaar for the idea and initial version of the
chart.

CC: Sean Molenaar <smillernl@me.com>

Also add `--commit` to a create commit without opening a pull request

Do the usual "disable deprecations" and "uncomment pending deprecations"
dance and delete/deprecate/disable relevant/related code.

- Adding and removing people from the calendar invite was a burden. So we rely on Slack reminders.

Bumps [minitest](https://github.com/seattlerb/minitest) from 5.14.1 to 5.14.2.
- [Release notes](https://github.com/seattlerb/minitest/releases)
- [Changelog](https://github.com/seattlerb/minitest/blob/master/History.rdoc)
- [Commits](https://github.com/seattlerb/minitest/compare/v5.14.1...v5.14.2

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: Sam Ford <1584702+samford@users.noreply.github.com>
Co-authored-by: Thierry Moisan <thierry.moisan@gmail.com>
Co-authored-by: Dawid Dziurla <dawidd0811@gmail.com>
Co-authored-by: Maxim Belkin <maxim.belkin@gmail.com>
Co-authored-by: Issy Long <me@issyl0.co.uk>
Co-authored-by: Mike McQuaid <mike@mikemcquaid.com>
Co-authored-by: Seeker <meaningseeking@protonmail.com>

This PR adds a new `brew typecheck` developer command which checks for
typechecking errors in the current code with Sorbet.

(cherry picked from commit 022571489a0f94ed54a0908167b553592cfe3277)

- Add `--stackprof` to allow using stackprof
- Use the latest version of `ruby-prof`
- Automatically open the generated HTML output

also fix typo in `--root-url` option

Bumps [html-pipeline](https://github.com/jch/html-pipeline) from 2.13.0 to 2.14.0.
- [Release notes](https://github.com/jch/html-pipeline/releases)
- [Changelog](https://github.com/jch/html-pipeline/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jch/html-pipeline/compare/v2.13.0...v2.14.0

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [concurrent-ruby](https://github.com/ruby-concurrency/concurrent-ruby) from 1.1.6 to 1.1.7.
- [Release notes](https://github.com/ruby-concurrency/concurrent-ruby/releases)
- [Changelog](https://github.com/ruby-concurrency/concurrent-ruby/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ruby-concurrency/concurrent-ruby/compare/v1.1.6...v1.1.7

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github-pages](https://github.com/github/pages-gem) from 206 to 207.
- [Release notes](https://github.com/github/pages-gem/releases)
- [Commits](https://github.com/github/pages-gem/compare/v206...v207

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

These were all made `--formulae` and `--casks` for consistency but that
doesn't behave as expected because they have special behaviours in
`args`. Instead, use the singular form everywhere.

This allows auditing a single tap (so is useful for `test-bot`).

- Ensure the usage documentation always mentions casks when appropriate
- Use --formulae or --casks consistently
- Provide --formulae and --casks switches to upgrade
- Mark more switches as conflicting

Bumps [dnsruby](https://github.com/alexdalitz/dnsruby) from 1.61.3 to 1.61.4.
- [Release notes](https://github.com/alexdalitz/dnsruby/releases)
- [Changelog](https://github.com/alexdalitz/dnsruby/blob/master/RELEASE_NOTES.md)
- [Commits](https://github.com/alexdalitz/dnsruby/commits/v1.61.4

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: Jonathan Chang <jchang641@gmail.com>