We're not actually using this anywhere and it makes the code
more complicated.

Relatedly, this PR fixes the issue where
`uses_from_macos "python@2" => :build` was valid on macOS but not
on Linux.

Bumps [rubocop](https://github.com/rubocop-hq/rubocop) from 0.77.0 to 0.78.0.
- [Release notes](https://github.com/rubocop-hq/rubocop/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop-hq/rubocop/compare/v0.77.0...v0.78.0

)

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

Bumps [activesupport](https://github.com/rails/rails) from 6.0.2 to 6.0.2.1.
- [Release notes](https://github.com/rails/rails/releases)
- [Changelog](https://github.com/rails/rails/blob/v6.0.2.1/activesupport/CHANGELOG.md)
- [Commits](https://github.com/rails/rails/compare/v6.0.2...v6.0.2.1

)

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

- Without this, `brew man` produces a lowercasing diff that violates
  Vale's rules.
- Also run `brew man` to test this out, and that updated some dates to
  December.

Bumps [thor](https://github.com/erikhuda/thor) from 0.20.3 to 1.0.1.
- [Release notes](https://github.com/erikhuda/thor/releases)
- [Changelog](https://github.com/erikhuda/thor/blob/master/CHANGELOG.md)
- [Commits](https://github.com/erikhuda/thor/compare/v0.20.3...v1.0.1

)

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

- Concourse CI uses `garden` under the hood for its containers.
- Running the Homebrew Docker container for a Concourse job was failing
  with the "can't run as root" error. In the same way as
  bc320ad2, this adds `garden` as one of
  the allowed providers.

Bumps [rubocop-rspec](https://github.com/rubocop-hq/rubocop-rspec) from 1.37.0 to 1.37.1.
- [Release notes](https://github.com/rubocop-hq/rubocop-rspec/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop-rspec/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop-hq/rubocop-rspec/compare/v1.37.0...v1.37.1

)

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

Rather than a base `RuntimeError`.

Fixes https://github.com/Homebrew/brew/issues/6839

`--all` and `--installed` do not require formulae arguments.

Fixes https://github.com/Homebrew/brew/issues/6842

Bumps [activesupport](https://github.com/rails/rails) from 6.0.1 to 6.0.2.
- [Release notes](https://github.com/rails/rails/releases)
- [Changelog](https://github.com/rails/rails/blob/v6.0.2/activesupport/CHANGELOG.md)
- [Commits](https://github.com/rails/rails/compare/v6.0.1...v6.0.2

)

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

Bumps [json](https://github.com/flori/json) from 2.2.0 to 2.3.0.
- [Release notes](https://github.com/flori/json/releases)
- [Changelog](https://github.com/flori/json/blob/master/CHANGES.md)
- [Commits](https://github.com/flori/json/commits

)

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

We never care about it and it's not relevant anywhere except 10.14.

This is most likely an old formula with bad dependency data so output
the path so it can be uninstalled.

Use `runtime_formula_dependencies` which does this for us.

Fixes #6827.

Bumps [parallel_tests](https://github.com/grosser/parallel_tests) from 2.29.2 to 2.30.0.
- [Release notes](https://github.com/grosser/parallel_tests/releases)
- [Commits](https://github.com/grosser/parallel_tests/compare/v2.29.2...v2.30.0

)

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

fixes #6821

openjdk links against this library, which is provided by glibc.

Brew prints this error:
```
Error: undefined method `join' for nil:NilClass
```

because, in this code:

```ruby
puts pinned_dependents.map do |f|
  "#{f.full_specified_name} #{f.pkg_version}"
end.join(", ")
```
the block is passed to `puts` and not to `map`. `.join(",")` is called on the output of `puts`.

(I think the regression was introduced in this commit: e12a7b08)

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.10.5 to 1.10.7.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sparklemotion/nokogiri/compare/v1.10.5...v1.10.7

)

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

Bumps [mustache](https://github.com/mustache/mustache) from 1.1.0 to 1.1.1.
- [Release notes](https://github.com/mustache/mustache/releases)
- [Changelog](https://github.com/mustache/mustache/blob/master/HISTORY.md)
- [Commits](https://github.com/mustache/mustache/compare/v1.1.0...v1.1.1

)

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