Bumps [html-proofer](https://github.com/gjtorikian/html-proofer) from 3.14.1 to 3.15.0.
- [Release notes](https://github.com/gjtorikian/html-proofer/releases)
- [Commits](https://github.com/gjtorikian/html-proofer/compare/v3.14.1...v3.15.0

)

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

build: bump json from 2.2.0 to 2.3.0 in /Library/Homebrew

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>

os/mac/xcode: bump Xcode/CLT versions (and cleanup)

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

argv: move formulae to cli/args

formula: handle missing runtime dependency formulae.

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

cmd/leaves: handle missing formula.

Use `runtime_formula_dependencies` which does this for us.

Fixes #6827.

build: bump parallel_tests from 2.29.2 to 2.30.0 in /Library/Homebrew

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>

docs/Homebrew-on-Linux: update Twitter.

cask version MAJOR_MINOR_PATCH_REGEX: allow any word character instead of only digits

Fix `bump-formula-pr` on a file with no tap

fixes #6821

linkage_checker: whitelist libthread_db.so.1

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

build: bump listen from 3.2.0 to 3.2.1 in /docs

Bumps [listen](https://github.com/guard/listen) from 3.2.0 to 3.2.1.
- [Release notes](https://github.com/guard/listen/releases)
- [Commits](https://github.com/guard/listen/compare/v3.2.0...v3.2.1

)

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

Fix bug with printing pinned dependencies.

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)

FormulaInstaller: rescue already attempted install

build: bump nokogiri from 1.10.5 to 1.10.7 in /Library/Homebrew

build: bump mustache from 1.1.0 to 1.1.1 in /Library/Homebrew

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>

build: bump github-pages from 202 to 203 in /docs

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>

Bumps [github-pages](https://github.com/github/pages-gem) from 202 to 203.
- [Release notes](https://github.com/github/pages-gem/releases)
- [Commits](https://github.com/github/pages-gem/compare/v202...v203

)

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

.github/workflows/tests: run config, doctor.

This should help with debugging why the `brew bundle` tests are now
failing.