Pass individual args explicitly to `ENV` extensions.

pr-automerge: fix variable name

pr-upload: fix for non-homebrew-core taps

dev-cmd/pr-*: allow to run on other taps too

Fix uninitialized constant Cask::Pkg

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

bottle: fix inreplace string

dev-cmd/bump-formula-pr.rb: fix StringInreplaceExtension usage

pr-upload: ensure bottle and formula version match

Allow references to casks when running upgrade and outdated

Co-authored-by: Dawid Dziurla <dawidd0811@gmail.com>
Co-authored-by: Mike McQuaid <mike@mikemcquaid.com>

Unify (mostly) Homebrew code style

README.md: Add link to Homebrew blog

Add link to Homebrew Blog in CHANGELOG.md

- make `brew readall` only check Homebrew/brew syntax with no tap
  passed.
- pass specified tap to `brew readall` test for speed
- only shell out once in `FormulaInfo` test for speed

Make the Homebrew/cask and Homebrew/homebrew-core style more closely
match the rest of Homebrew.

To accomplish this:
- Run `brew cask style` to ensure we don't break style there when
  making changes or upgrading RuboCop in Homebrew/brew.
- Fix the HomepageMatchesUrl cop to better handle weird input.
- Remove the now unneeded `.rubocop_shared.yml`
- Fix the cask fixtures with `brew cask style --fix`.
- Share more style between Homebrew/brew, casks and formulae.

commands: Print cask commands

Inspired by https://github.com/Homebrew/brew/issues/8096 and https://github.com/Homebrew/brew/pull/8098

. I think the blog is an important way for regular users to keep up-to-date with Homebrew evolution, so it deserves an entry in the main docs page.

Update docs/README.md

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

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

bump-formula-pr: fix when no 'version' stanza in formula found

sorbet/files.yaml: add new file

Latest changes to fetch.rb introduced 2 new type errors.
These changes in sorbet/rbi/homebrew.rbi resolves those errors.

sorbet: set utils/inreplace.rb to true

Without this fix, a command like:

    `brew bump-formula-pr --version=0.3.3 --tag=v0.3.3 --revision=... test-formula-git-revision`

will fail because:

```
Error: no implicit conversion of nil into String
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/dev-cmd/bump-formula-pr.rb:281:in `escape'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/dev-cmd/bump-formula-pr.rb:281:in `bump_formula_pr'
/home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/brew.rb:111:in `<main>'
```

Additionally, reject all `nil` replacement pairs by calling `compact`
method.

- Sorbet gives preference to class methods over methods defined in
  included modules, hence Sorbet was unavailable to resolve the
definition of the gsub! method.
- The gsub! method in StringInreplaceExtension conflicts with the definition in String.
- This PR refactors the call to the gsub! method so that a custom object
  is exposed instead of a string.