Bumps [rubocop](https://github.com/rubocop-hq/rubocop) from 0.67.2 to 0.68.0.
- [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/v0.67.2...v0.68.0

)

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

Freeze more strings

build: bump backports from 3.13.0 to 3.14.0 in /Library/Homebrew

Freeze the results changed in #6072.

build: bump parser from 2.6.2.1 to 2.6.3.0 in /Library/Homebrew

Bumps [parser](https://github.com/whitequark/parser) from 2.6.2.1 to 2.6.3.0.
- [Release notes](https://github.com/whitequark/parser/releases)
- [Changelog](https://github.com/whitequark/parser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/whitequark/parser/compare/v2.6.2.1...v2.6.3.0

)

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

Bumps [backports](https://github.com/marcandre/backports) from 3.13.0 to 3.14.0.
- [Release notes](https://github.com/marcandre/backports/releases)
- [Changelog](https://github.com/marcandre/backports/blob/master/CHANGELOG.rdoc)
- [Commits](https://github.com/marcandre/backports/compare/v3.13.0...v3.14.0

)

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

Fix exception inception.

utils/github: fix mutable string syntax

reinstall: don't build bottles unnecessarily.

Apply the same changes from #6066.

Also apply the same logics from `brew upgrade` to preserve
`installed_as_dependency`/`installed_on_request` settings
when reinstalling formulae.

utils/github: fix frozen string usage.

See https://discourse.brew.sh/t/error-cant-modify-frozen-string/4691/4

upgrade: don't build bottles unnecessarily.

Fixes #6063.

build: bump gemoji from 3.0.0 to 3.0.1 in /docs

Bumps [gemoji](https://github.com/github/gemoji) from 3.0.0 to 3.0.1.
- [Release notes](https://github.com/github/gemoji/releases)
- [Commits](https://github.com/github/gemoji/commits

)

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

xcode: upgrade for Xcode 10.2.1 release

cmd/info: fix frozen pathname usage.

Fixes #6055.

python_virtualenv_constants: upgrade virtualenv to 16.5.0

Fix check_for_unsupported_macos() on outdated releases

utils: fix frozen string usage in odeprecated.

Fixes https://github.com/Homebrew/brew/issues/6053

Recent commit https://github.com/Homebrew/brew/commit/36dbad3922ad984f7c396a9757fe8ae9750c44b0 to default to frozen string literals (via `frozen_string_literal`) broke `check_for_unsupported_macos()` on outdated releases--due to attempted modification of a frozen string literal.

This breaks `install` and `doctor`.

It's like the change wasn't tested on an unsupported outdated release or something... :D

Adding a `+` prefix is apparently one way around this issue according to https://stackoverflow.com/questions/37799296/what-does-the-comment-frozen-string-literal-true-do#37799399. The change worked for me.

build: bump github-pages from 197 to 198 in /docs

These weren't added yet due to CI being run at different times to
merges.

Bumps [github-pages](https://github.com/github/pages-gem) from 197 to 198.
- [Release notes](https://github.com/github/pages-gem/releases)
- [Commits](https://github.com/github/pages-gem/commits

)

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

[Security] Bump nokogiri from 1.10.2 to 1.10.3 in /docs

config: don't show HOMEBREW_DISPLAY.

Use FrozenStringLiteralComment instead of flag.