* Bump ruby version to 2.4.2

https://www.ruby-lang.org/en/news/2017/09/14/ruby-2-4-2-released/

Gemfile.lock is also updated.

TODO
- [ ] Update Dockerfile with Alpine release of ruby-2.4.2

* Revert jwt version

It seems that jwt 2.0.0 fails in some environment.
ref. https://github.com/zaru/webpush/issues/42

* Bump Ruby version on docker image

Bumps [puma](https://github.com/puma/puma) from 3.9.1 to 3.10.0.
- [Release notes](https://github.com/puma/puma/releases/tag/v3.10.0)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](https://github.com/puma/puma/compare/v3.9.1...v3.10.0)

Bumps [rails](https://github.com/rails/rails) from 5.1.3 to 5.1.4.
- [Commits](https://github.com/rails/rails/compare/v5.1.3...v5.1.4)

* Fix language filter codes

CLD3 returns BCP-47 language identifier, filter settings expect
identifiers in the ISO 639-1 format. Convert between formats,
and exclude duplicate languages from filter choices (zh-CN->zh)

* Fix zh name

* Add handling of Linked Data Signatures in payloads

* Add a way to sign JSON, fix canonicalization of signature options

* Fix signatureValue encoding, send out signed JSON when distributing

* Add missing security context

* Update twitter-text to version 1.14.7

* Update tilt to version 2.0.8

* Update statsd-instrument to version 2.1.4

* Update sidekiq to version 5.0.4

* Update sidekiq-scheduler to version 2.1.8

* Update sidekiq-unique-jobs to version 5.0.9

* Update redis-activesupport to version 5.0.3

* Update rails-settings-cached to version v0.6.6

* Update pkg-config to version 1.2.4

* Update parallel_tests to version 2.14.2

* Update jsonapi-renderer to version 0.1.3

* Update i18n-tasks to version 0.9.16

* Update httplog to version 0.99.7

* Update fabrication to version 2.16.2

* Update bootsnap to version 1.1.2

* Update aws-sigv4 to version 1.0.1

* Update aws-sdk-core to version 2.10.21

* Update hashdiff to version 0.3.5

* Update rails to version 5.1.3

- No masking of HTTP::Error and OpenSSL::SSL::SSLError
- No longer accepts non-HTTPS WebFinger endpoints

* Refactor ResolveRemoteAccountService

* Remove trailing whitespace

* Use redis locks around critical ResolveRemoteAccountService code

* Add test for race condition of lock

* Add dependency on idn-ruby to speed up URI normalization

* Use normalized_host instead of normalize.host when applicable

When we are only interested in the normalized host, calling normalized_host
avoids normalizing the other components of the URI as well as creating a
new object

- Use unicode when selecting emoji through picker
- Convert shortcodes to unicode when storing text input server-side
- Do not convert shortcodes in JS anymore

* feat: Register push subscription

* feat: Notify when mentioned

* feat: Boost, favourite, reply, follow, follow request

* feat: Notification interaction

* feat: Handle change of public key

* feat: Unsubscribe if things go wrong

* feat: Do not send normal notifications if push is enabled

* feat: Focus client if open

* refactor: Move push logic to WebPushSubscription

* feat: Better title and body

* feat: Localize messages

* chore: Fix lint errors

* feat: Settings

* refactor: Lazy load

* fix: Check if push settings exist

* feat: Device-based preferences

* refactor: Simplify logic

* refactor: Pull request feedback

* refactor: Pull request feedback

* refactor: Create /api/web/push_subscriptions endpoint

* feat: Spec PushSubscriptionController

* refactor: WebPushSubscription => Web::PushSubscription

* feat: Spec Web::PushSubscription

* feat: Display first media attachment

* feat: Support direction

* fix: Stuff broken while rebasing

* refactor: Integration with session activations

* refactor: Cleanup

* refactor: Simplify implementation

* feat: Set VAPID keys via environment

* chore: Comments

* fix: Crash when no alerts

* fix: Set VAPID keys in testing environment

* fix: Follow link

* feat: Notification actions

* fix: Delete previous subscription

* chore: Temporary logs

* refactor: Move migration to a later date

* fix: Fetch the correct session activation and misc bugs

* refactor: Move migration to a later date

* fix: Remove follow request (no notifications)

* feat: Send administrator contact to push service

* feat: Set time-to-live

* fix: Do not show sensitive images

* fix: Reducer crash in error handling

* feat: Add badge

* chore: Fix lint error

* fix: Checkbox label overlap

* fix: Check for payload support

* fix: Rename action "type" (crash in latest Chrome)

* feat: Action to expand notification

* fix: Lint errors

* fix: Unescape notification body

* fix: Do not allow boosting if the status is hidden

* feat: Add VAPID keys to the production sample environment

* fix: Strip HTML tags from status

* refactor: Better error messages

* refactor: Handle browser not implementing the VAPID protocol (Samsung Internet)

* fix: Error when target_status is nil

* fix: Handle lack of image

* fix: Delete reference to invalid subscriptions

* feat: Better error handling

* fix: Unescape HTML characters after tags are striped

* refactor: Simpify code

* fix: Modify to work with #4091

* Sort strings alphabetically

* i18n: Updated Polish translation

it annoys me that it's not fully localized :P

* refactor: Use current_session in PushSubscriptionController

* fix: Rebase mistake

* fix: Set cacheName to mastodon

* refactor: Pull request feedback

* refactor: Remove logging statements

* chore(yarn): Fix conflicts with master

* chore(yarn): Copy latest from master

* chore(yarn): Readd offline-plugin

* refactor: Use save! and update!

* refactor: Send notifications async

* fix: Allow retry when push fails

* fix: Save track for failed pushes

* fix: Minify sw.js

* fix: Remove account_id from fabricator

* Specs for language detection

* Use CharlockHolmes instead of NKF

* Correct mistakes

* Correct style

* Set hint_enc instead of falling back and strip_tags

* Improve specs

* Add dependencies

* Update aws-sdk to version 2.10.4

* Update bootsnap to version 1.1.1

* Update capistrano to version 3.8.2

* Update capybara to version 2.14.4

* Update cld3 to version 3.1.3

* Update http_accept_language to version 2.1.1

* Update sidekiq to version 5.0.3

* Update rspec-sidekiq to version 3.0.3

* Update sidekiq-scheduler to version 2.1.7

* Update oj to version 3.2.0

* Update openssl to version 2.0.4

* Update pg to version 0.21.0

* Update twitter-text to version 1.14.6

* Update unicode-display_width to version 1.3.0

* Update scss_lint to version 0.54.0

* Update hamlit to version 2.8.4

* Update erubi to version 1.6.1

* Update httplog to version 0.99.4

* Update aws-sdk to version 2.10.6

* Add overview of active sessions

* Better display of browser/platform name

* Improve how browser information is stored and displayed for sessions overview

* Fix test

* Update mail to version 2.6.6

* Update aws-sdk to version 2.9.37

* Update capybara to version 2.14.2

* Update oj to version 3.1.0

* Update sidekiq to version 5.0.2

* Update puma to version 3.9.1

* Update sanitize to version 4.5.0

* Update capistrano-rails to version 1.3.0

$ bundle update --source nokogumbo# Please enter the commit message for your changes. Lines starting

nokogumbo 1.4.11 and 1.4.12 don't work on Heroku.

* Update annotate to version 2.7.2

* Update puma to version 3.9.0

* Update aws-sdk to version 2.9.28

* Update bootsnap to version 1.0.0

* Update nio4r to version 2.1.0

* Update nokogumbo to version 1.4.12

* Update oj to version 3.0.11

* Update pkg-config to version 1.2.3

* Update rubocop to version 0.49.1

* Update sidekiq-scheduler to version 2.1.5

* Update rails to version 5.1.1

* Run `rails app:update`

* Remove the override of polymorphic activity relationship

* Silence warning about otp_secret attribute being unknown to rails

* We will only introduce form_with where we want to use remote data

* Keep ENV['LOCAL_HTTPS'] with ApplicationControllerSpec (fix random fail)

* use climate_control

* Update xpath to version 2.1.0

* Update aws-sdk to version 2.9.25

* Update oj to version 3.0.10

* Update brakeman to version 3.6.2

* Update rufus-scheduler to version 3.4.2

* Update doorkeeper to version 4.2.6

* Update rubocop to version 0.49.0

* Update terminal-table to version 1.8.0

* Update aws-sdk to version 2.9.20

* Update cld3 to version 3.1.2

* Update microformats2 to version 3.1.0

* Update rails-controller-testing to version 1.0.2

* Update oj to version 3.0.8

* Update http-form_data to version 1.0.3

* Update nokogumbo to version 1.4.11

* Update simplecov-html to version 0.10.1

* Update aws-sdk to version 2.9.21

* Update oj to version 3.0.9

* Update sass to version 3.4.24

* Update simple_form to version 3.5.0

Supports rails 5.1

* Update rails to version 5.0.3

* Update aws-sdk to version 2.9.17

* Update capistrano to version 3.8.1

* Update climate_control to version 0.2.0

* Update debug_inspector to version 0.0.3

* Update et-orbi to version 1.0.4

* Update oj to version 3.0.7

* Update microformats2 to version 2.9.0

* Update lograge to version 0.5.1

* Clean up usage of Microformats2 object to remove deprecation warnings

* Update microformats2 to version 3.0.1

According to the release message:
> Fix for macOS and minor improvements

Compact Language Detector v3 (CLD3) is the successor of CLD2, which was
used in the previous implementation. CLD3 includes improvements since CLD2,
and supports newer compilers. On the other hand, it has additional
requirements and cld3-ruby, the FFI of CLD3 for Ruby, is still new and may
be still inmature.

Though CLD3 is named after CLD2, it is implemented with a neural network
model, different from the old implementation, which is based on a Naïve
Bayesian classifier.

CLD3 supports newer compilers, such as GCC 6. CLD2 is not compatible with
GCC 6 because it assigns negative values to varibales typed unsigned.
(see internal/cld_generated_cjk_uni_prop_80.cc) The support for GCC 6 and
newer compilers are essential today, when some server operating system
such as Ubuntu Server 16.10 has GCC 6 by default.

On the one hand, CLD3 requires C++11 support. Environments with old
compilers such as Ubuntu Server 14.04 needs to update the system or install
a newer compiler.

CLD3 needs protocol buffers as a new dependency. However,it is not
considered problematic because major server operating systems, CentOS and
Ubuntu Server provide them.

The FFI cld3-ruby was written by me (Akihiko Odaki) for use in Mastodon.
It is still new and may be inmature, but confirmed to pass existing tests.

* Update bundler-audit to version 0.5.0

* Update oj to version 3.0.6

* Update http-form_data to version 1.0.2

* Update parallel to version 1.11.2

* Update rails-i18n to version 5.0.4

* Update rack-protection to version 2.0.0

* Update haml to version 5.0.1

* Update scss_lint to version 0.53.0

* Relax requirement on i18n-tasks

* Remove haml and haml_lint gem requirement

* add haml_lint to Gemfile

* add .haml-lint.yml

* fix warnings of haml_lint

* add scss_lint to Gemfile

* add .scss-lint.yml

* fix warnings of scss-lint

* chmod -x styles/variables.scss

* Enable CodeClimate SCSS Lint checks