It blocks uploading to GitHub Releases where Bintray credentials are not needed.
Also those checks are already performed in `bintray.rb`.

Co-authored-by: Mike McQuaid <mike@mikemcquaid.com>

This allows reducing the volume of `brew update` output by only
outputting the changes to formulae that you have installed.

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.

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.

- 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

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

This should allow better handling flaky tests.

This should help with cases like
https://github.com/Homebrew/homebrew-bundle/issues/751
and is good practise in general.

Also, document the `brew update --preinstall` flag that is being used
here so others can run it manually e.g. as part of CI if needed.