2.1.11

• python_virtualenv_constants: upgrade virtualenv to 16.7.4 (@lembacon)
• breadth-first search for dependents upgrade (@amyspark)
• Improve ZSH completion so local formula files are completable (@lbergelson)
• Remove brew cask automerge. (@reitermarkus)
• messages_spec: handle frozen Homebrew.args. (@MikeMcQuaid)
• Use MacOSRequirement for casks. (@reitermarkus)
• Add fallback for out-of-spec Last-Modified header. (@reitermarkus)
• Try caching the Docker image. (@reitermarkus)
• workflows/tests: hardcode coveralls token. (@MikeMcQuaid)
• man: support multi-line paragraphs in comment-based docs (@EricFromCanada)
• manpages: fixes and rewording (@EricFromCanada)
• GitHub Actions CI (@Homebrew)
• Fix typos (@jonchang)
• os/mac/diagnostic: allow use of GitHub Actions CI. (@MikeMcQuaid)
• Move global methods into Kernel module. (@reitermarkus)
• build: bump dnsruby from 1.61.2 to 1.61.3 in /docs (@Homebrew)
• Support deleting login items by path. (@reitermarkus)
• utils: make redact_secrets handle nil secrets. (@MikeMcQuaid)
• build: bump html-pipeline from 2.11.1 to 2.12.0 in /docs (@Homebrew)