python_virtualenv_constants: upgrade virtualenv to 16.2.0

README: remove coverage badge.

Coveralls works fine for PRs but is a bit too flaky for the master branch.

Remove Travis CI specific code

We’re no longer using this for our CI so this is no longer necessary.

Also, migrate `brew tap-new` to use Azure pipelines.

Migrate from CodeCov to Coveralls

brew.sh: make update --preinstall exec.

Revert "diagnostic: share prefix check"

This means that any new environment variables or changes to `bin/brew`
or `brew.sh` will be used in the new process. This also allows the
removal of various fallbacks from autoupdates from old versions.

diagnostic: share prefix check

Whitelist TERMINFO environment variable

Bump plist from 3.4.0 to 3.5.0 in /Library/Homebrew/vendor

We can't just link it to the right place since bin/brew calls pwd -P.

brew.sh: set correct log path [Linux]

update-test: fix for mkdir block form

Fix bogus comparison operation that was breaking error handling

Merge pull request #5442 from Homebrew/dependabot/bundler/Library/Homebrew/vendor/unicode-display_width-1.4.1

Bump unicode-display_width from 1.4.0 to 1.4.1 in /Library/Homebrew/vendor

Bumps [unicode-display_width](https://github.com/janlelis/unicode-display_width) from 1.4.0 to 1.4.1.
- [Release notes](https://github.com/janlelis/unicode-display_width/releases)
- [Changelog](https://github.com/janlelis/unicode-display_width/blob/master/CHANGELOG.md)
- [Commits](https://github.com/janlelis/unicode-display_width/compare/v1.4.0...v1.4.1

)

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

Bumps [plist](https://github.com/patsplat/plist) from 3.4.0 to 3.5.0.
- [Release notes](https://github.com/patsplat/plist/releases)
- [Changelog](https://github.com/patsplat/plist/blob/master/CHANGELOG.rdoc)
- [Commits](https://github.com/patsplat/plist/commits

)

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

Bump i18n from 1.2.0 to 1.3.0 in /Library/Homebrew/vendor

build: Propagate entire ErrorDuringExecution

Fixes https://github.com/Homebrew/brew/issues/5427.

README: add igas, claui surname.

Allow incomplete downloads to be resumed even when server rejects HEAD requests

Formula-Cookbook.md: fix wording

hardware: tweak macOS CFLAGS.

- High Sierra and Sierra support Penryn CPUs.
- `-march` implies the relevant `-msse*` flags.

Add `brew vendor-gems` command.