Update `rubocop-cask` version.

xcode: update to Xcode 9.0.1 on 10.12 and 10.13

In 'readall.rb', replaced multi-step 'each' loop with one-line method chain of Ruby enumerator methods

 Use “squiggly” heredocs.

commands: filter out dotfiles from output

Use a more typical Ruby style.

readall: allow readall-ing multiple taps at once

Support `brew pull --bottle` for taps in organizations other than Homebrew

setup-ruby-path: Ensure that Ruby is installed

portable-ruby: use rebuild with coverage support for Linux.

doctor: Check for branch of core tap (take 2)

Handle APFS returning hash order.

vendor-install: use full shasum PATH.

caveats.rb: empty method on Linux

 lines_cop: add ENV.universal_binary audit exemption for wine

java_requirement: fix Java 9 version detection

Add depends_on :linux and :macos

Specifies which errant version of Ruby is used in raise.

Closes https://github.com/Homebrew/brew/issues/3331.

Memoize recursive dependency checks; reduces calls to 'f.recursive_dependencies' by an order of magnitude

Address the style issue:
C: Module has too many lines. [364/360]

Infer the name of the test-bot GitHub user if it is not provided.

Infer the name of the Bintray organization if it's not provided.

Move MinimumMacOSRequirement to compat.