Use the latest Sorbet version and regenerate Tapioca RBIs

audit: forbid deprecated licenses with --strict

bundler: use 1.17.2 again.

This was what is included with macOS system Ruby 2.6.3.

Add `language` stanza to cask rubocops

Also fix the corresponding test

Fix order and grouping of cask stanzas

Move `cask/all` to just `cask`.

Actually run `brew cask style` on all taps.

- Put `desc` stanza after the `name` stanza
- Add missing `vst3_plugin` stanza to the group containing `vst_plugin`

- [The docs](https://sorbet.org/docs/rbi#the-hidden-definition-rbi) say
  we have to do this whenever gems are bumped.

- This was originally pinned in 1a6467ee
  because we found that later versions surfaced over 100 new typing errors
  in Tapioca's autogenerated RBI files. It seems like these are able to
  be fixed now.

Gemfile: drop sorbet environment

Add a `desc` stanza to the cask DSL

The extracted module will be used for Cask descs as well.

Co-authored-by: Markus Reiter <me@reitermark.us>

build(deps-dev): bump github-pages from 206 to 207 in /docs

keep  BUNDLER_VERSION in sync with Gemfile.lock

bin/brew: allow GITHUB_ACTIONS_HOMEBREW_SELF_HOSTED.

Otherwise test-bot will not behave as expected.

bump-formula-pr, utils/pypi: tweak log messages

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>

cask/dsl/base: fix undefined method `method_missing_message'

Add strategy to livecheck DSL

bin/brew: only export CI if not set.

Also: GitHub Actions already sets it.

build(deps): bump codecov from 0.2.3 to 0.2.5 in /Library/Homebrew

cmd/upgrade: fix cask/formula args (again).

utils: add SPDX module

Fixes https://github.com/Homebrew/brew/issues/8228#issuecomment-670161766