Since https://github.com/puma/puma/pull/1700, the default host is
correctly used. So `localhost` is used instead of `0.0.0.0`.

As a result, the log output on restart is changed, and the restart test
fails on Puma 3.12.1.
https://travis-ci.org/rails/rails/jobs/509239592#L2303-L2305

Specify binding explicitly to avoid being affected by Puma changes.

* Bump RAILS_VERSION
* Bundle
* rake update_versions
* rake changelog:header

Follow up to #35154.

Fix tests on Mail 2.7.1

Fix av-ujs build

update I18n fallbacks configuration to be compatible with i18n 1.1.0

Avoid i18n 1.1.0 for now

Thor 0.18 is causing failures in all the generator tests.

There's no reason to block future versions of Capybara since we don't
_know_ they are going to break. How will we know if we have a
conservative option set? This change prevents us from blocking users who
want to upgrade in the future.

cherry-pick 72f17d59

The issue was fixed with https://github.com/petergoldstein/dalli/pull/679,
and a new version containing that fix was released.

Without this fix, `bundle update` raise an error as follows.

```
Bundler could not find compatible versions for gem "bunny":
  In snapshot (Gemfile.lock):
    bunny (= 2.6.7)

  In Gemfile:
    sneakers was resolved to 2.7.0, which depends on
      bunny (~> 2.9.2)

Running `bundle update` will rebuild your snapshot from scratch, using only
the gems in your Gemfile, which may resolve the conflict.
```

It seems that made an incorrect version specification
with 655ff935.

These went missing in b5d26248, which
was causing `bundle install` to fail with:

    Downloading capybara-3.0.1 revealed dependencies not in the API or the lockfile (addressable (>= 0), mini_mime (>= 0.1.3), nokogiri (~> 1.8), rack (>= 1.6.0), rack-test (>= 0.6.3), xpath (~> 3.0)).
    Either installing with `--full-index` or running `bundle update capybara` should fix the problem.

    In Gemfile:
      capybara

It seems that it is no longer possible to specify the value held by
`Capybara.server` as sever.

Ref: https://github.com/teamcapybara/capybara/commit/ba7674086cbcd3b22d3614011815bc5d483e5960

Sidekiq 5.1.3 fixes the version check on Ruby 2.2.10.

Given that 2.2.10 is the final release of Ruby 2.2 then it's unlikely
that https://bugs.ruby-lang.org/issues/13632 will be backported.

- Tried to run bundle install on 5-2-stable and duplicate entry for
  nokogiri removed.
- Introduced in 5f539ce5

gzip_path can also have a different encoding in Ruby 2.2

Support mysql2 0.4.x and 0.5.x

Somehow `test_config_another_database` didn't fail on CI, but it will
fail locally.

https://travis-ci.org/rails/rails/jobs/356212950#L2474-L2482

```
% bundle exec ruby -w -Itest test/generators/app_generator_test.rb -n test_config_another_database
Run options: -n test_config_another_database --seed 7260

# Running:

F

Failure:
AppGeneratorTest#test_config_another_database [test/generators/app_generator_test.rb:417]:
Expected /^\s*gem\s+["']mysql2["'], '~> 0.4.4'$*/ to match "source 'https://rubygems.org'\ngit_source(:github) { |repo| \"https://github.com/\#{repo}.git\" }\n\nruby '2.5.0'\n\n# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'\ngem 'rails', '~> 6.0.0.alpha'\n# Use mysql as the database for Active Record\ngem 'mysql2', '>= 0.4.4', '< 0.6.0'\n# Use Puma as the app server\ngem 'puma', '~> 3.11'\n# Use SCSS for stylesheets\ngem 'sass-rails', '~> 5.0'\n# Use Uglifier as compressor for JavaScript assets\ngem 'uglifier', '>= 1.3.0'\n# See https://github.com/rails/execjs#readme for more supported runtimes\n# gem 'mini_racer', platforms: :ruby\n\n# Use CoffeeScript for .coffee assets and views\ngem 'coffee-rails', '~> 4.2'\n# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks\ngem 'turbolinks', '~> 5'\n# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder\ngem 'jbuilder', '~> 2.5'\n# Use Redis adapter to run Action Cable in production\n# gem 'redis', '~> 4.0'\n# Use ActiveModel has_secure_password\n# gem 'bcrypt', '~> 3.1.7'\n\n# Use ActiveStorage variant\n# gem 'mini_magick', '~> 4.8'\n\n# Use Capistrano for deployment\n# gem 'capistrano-rails', group: :development\n\n# Reduces boot times through caching; required in config/boot.rb\ngem 'bootsnap', '>= 1.1.0', require: false\n\ngroup :development, :test do\n  # Call 'byebug' anywhere in the code to stop execution and get a debugger console\n  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]\nend\n\ngroup :development do\n  # Access an interactive console on exception pages or by calling 'console' anywhere in the code.\n  gem 'web-console', '>= 3.3.0'\n  gem 'listen', '>= 3.0.5', '< 3.2'\n  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring\n  gem 'spring'\n  gem 'spring-watcher-listen', '~> 2.0.0'\nend\n\ngroup :test do\n  # Adds support for Capybara system testing and selenium driver\n  gem 'capybara', '>= 2.15', '< 4.0'\n  gem 'selenium-webdriver'\n  # Easy installation and use of chromedriver to run system tests with Chrome\n  gem 'chromedriver-helper'\nend\n\n# Windows does not include zoneinfo files, so bundle the tzinfo-data gem\ngem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]\n".

bin/rails test test/generators/app_generator_test.rb:411

Finished in 0.174681s, 5.7247 runs/s, 34.3483 assertions/s.
1 runs, 6 assertions, 1 failures, 0 errors, 0 skips
```

See flavorjones/loofah#144

Follow up of #32151

Fixes #32129.

Although not a direct dependency, it's pulled in by Resque for
Active Job integration tests so we need to update because the
rack-protection gem has a security vulnerability[1].

[1]: https://nvd.nist.gov/vuln/detail/CVE-2018-7212

Refer to a stable release of SDoc