manpages: fixes and rewording

GitHub Actions CI

Use active voice when applicable, better verbs & adjectives, preposition usage, proper tense, etc.

Reorder switches as force/quiet/verbose/debug, --installed before --all, and link to SPECIFYING FORMULAE from top of page.

Try to setup GitHub Actions CI.

Fix typos

os/mac/diagnostic: allow use of GitHub Actions CI.

Move global methods into `Kernel` module.

build: bump dnsruby from 1.61.2 to 1.61.3 in /docs

We will be migrating Homebrew/brew to use this in the near future.

Bumps [dnsruby](https://github.com/alexdalitz/dnsruby) from 1.61.2 to 1.61.3.
- [Release notes](https://github.com/alexdalitz/dnsruby/releases)
- [Changelog](https://github.com/alexdalitz/dnsruby/blob/master/RELEASE_NOTES.md)
- [Commits](https://github.com/alexdalitz/dnsruby/commits

)

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

Otherwise they are not defined inside of subclasses of `DelegateClass`.

Support deleting login items by path.

utils: make redact_secrets handle `nil` secrets.

build: bump html-pipeline from 2.11.1 to 2.12.0 in /docs

Fixes #6363.

Bumps [html-pipeline](https://github.com/jch/html-pipeline) from 2.11.1 to 2.12.0.
- [Release notes](https://github.com/jch/html-pipeline/releases)
- [Changelog](https://github.com/jch/html-pipeline/blob/master/CHANGELOG.md)
- [Commits](https://github.com/jch/html-pipeline/compare/v2.11.1...v2.12.0

)

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

[security] build: bump nokogiri from 1.10.3 to 1.10.4 in /docs

[security] build: bump nokogiri from 1.10.3 to 1.10.4 in /Library/Homebrew

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.10.3 to 1.10.4.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sparklemotion/nokogiri/commits

)

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

Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.10.3 to 1.10.4.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sparklemotion/nokogiri/commits

)

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

Remove cask-eid tap from automerge

Since the homebrew-cask-eid tap is no longer in use, it should be removed from the command as well.

audit: whitelist numpy@1.16 without being versioned keg only