This two-line change fixes a crash in the front end that occurred
under the following circumstances:
 *  A server had more than one announcement,
 *  A user was displaying the announcements, and
 *  An announcement was deleted (or unpublished, which amounts to
    the same thing.)

As might be expected, the bug was caused by attempting to access a
notification using an index value outside the bounds of the existing
announcements.  Specifically, in two places.  First,
`_markAnnouncementAsRead` attempts to modify announcements based on
the current index.  This is what caused the front end crash.  Second,
when rendering the `Announcements` component, the code paginates the
announcements and displays the current one.  This did not cause a
crash, but caused the front end to confusingly display a blank
announcement (in situations that would have caused a crash) with no
way for the user to navigate back to previous announcements.

This commit fixes both issues by adding a check to ensure that the
code never attempts to access an announcement with an index greater
than or equal to the number of announcements present.

* Update Gemfile

* Update README.md

* Bump capistrano from 3.11.2 to 3.12.1

Bumps [capistrano](https://github.com/capistrano/capistrano) from 3.11.2 to 3.12.1.
- [Release notes](https://github.com/capistrano/capistrano/releases)
- [Commits](https://github.com/capistrano/capistrano/compare/v3.11.2...v3.12.1

)

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

* Bump capistrano from 3.11.2 to 3.12.1

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Co-authored-by: Yamagishi Kazutoshi <ykzts@desire.sh>

Bumps [webmock](https://github.com/bblimke/webmock) from 3.8.0 to 3.8.3.
- [Release notes](https://github.com/bblimke/webmock/releases)
- [Changelog](https://github.com/bblimke/webmock/blob/master/CHANGELOG.md)
- [Commits](https://github.com/bblimke/webmock/compare/v3.8.0...v3.8.3

)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Bumps [sidekiq-scheduler](https://github.com/moove-it/sidekiq-scheduler) from 3.0.0 to 3.0.1.
- [Release notes](https://github.com/moove-it/sidekiq-scheduler/releases)
- [Commits](https://github.com/moove-it/sidekiq-scheduler/compare/v3.0.0...v3.0.1

)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Bumps [simple_form](https://github.com/plataformatec/simple_form) from 5.0.1 to 5.0.2.
- [Release notes](https://github.com/plataformatec/simple_form/releases)
- [Changelog](https://github.com/heartcombo/simple_form/blob/master/CHANGELOG.md)
- [Commits](https://github.com/plataformatec/simple_form/compare/v5.0.1...v5.0.2

)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Bumps [json-ld](https://github.com/ruby-rdf/json-ld) from 3.1.0 to 3.1.1.
- [Release notes](https://github.com/ruby-rdf/json-ld/releases)
- [Commits](https://github.com/ruby-rdf/json-ld/compare/3.1.0...3.1.1

)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Bumps [redis](https://github.com/NodeRedis/node-redis) from 2.8.0 to 3.0.2.
- [Release notes](https://github.com/NodeRedis/node-redis/releases)
- [Changelog](https://github.com/NodeRedis/node-redis/blob/master/CHANGELOG.md)
- [Commits](https://github.com/NodeRedis/node-redis/compare/v.2.8.0...v3.0.2

)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Bumps [mkdirp](https://github.com/isaacs/node-mkdirp) from 0.5.1 to 1.0.3.
- [Release notes](https://github.com/isaacs/node-mkdirp/releases)
- [Changelog](https://github.com/isaacs/node-mkdirp/blob/master/CHANGELOG.md)
- [Commits](https://github.com/isaacs/node-mkdirp/commits/v1.0.3

)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Bumps [sass](https://github.com/sass/dart-sass) from 1.25.0 to 1.26.3.
- [Release notes](https://github.com/sass/dart-sass/releases)
- [Changelog](https://github.com/sass/dart-sass/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sass/dart-sass/compare/1.25.0...1.26.3

)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Bumps [react-test-renderer](https://github.com/facebook/react/tree/HEAD/packages/react-test-renderer) from 16.12.0 to 16.13.0.
- [Release notes](https://github.com/facebook/react/releases)
- [Changelog](https://github.com/facebook/react/blob/master/CHANGELOG.md)
- [Commits](https://github.com/facebook/react/commits/v16.13.0/packages/react-test-renderer

)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Bumps [react-dom](https://github.com/facebook/react/tree/HEAD/packages/react-dom) from 16.12.0 to 16.13.0.
- [Release notes](https://github.com/facebook/react/releases)
- [Changelog](https://github.com/facebook/react/blob/master/CHANGELOG.md)
- [Commits](https://github.com/facebook/react/commits/v16.13.0/packages/react-dom

)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Bumps [babel-jest](https://github.com/facebook/jest/tree/HEAD/packages/babel-jest) from 24.9.0 to 25.1.0.
- [Release notes](https://github.com/facebook/jest/releases)
- [Changelog](https://github.com/facebook/jest/blob/master/CHANGELOG.md)
- [Commits](https://github.com/facebook/jest/commits/v25.1.0/packages/babel-jest

)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Bumps [react-immutable-proptypes](https://github.com/HurricaneJames/react-immutable-proptypes) from 2.1.0 to 2.2.0.
- [Release notes](https://github.com/HurricaneJames/react-immutable-proptypes/releases)
- [Changelog](https://github.com/HurricaneJames/react-immutable-proptypes/blob/master/CHANGELOG.md)
- [Commits](https://github.com/HurricaneJames/react-immutable-proptypes/commits

)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Fixes #13266

Only look up private toots from database if the request failed because of 401,
403 or 404 errors, as those may indicate a private toot, rather than something
that isn't a toot or cannot be processed.

* Add shortcuts to blacklist a user's e-mail domain in admin UI

* Add option to blacklist resolved MX and IP records for e-mail domains

The boost count is already removed from private toots,
do the same with direct messages.

* Update Dockerfile

* Update Dockerfile

Bumps [eslint-plugin-react](https://github.com/yannickcr/eslint-plugin-react) from 7.17.0 to 7.19.0.
- [Release notes](https://github.com/yannickcr/eslint-plugin-react/releases)
- [Changelog](https://github.com/yannickcr/eslint-plugin-react/blob/master/CHANGELOG.md)
- [Commits](https://github.com/yannickcr/eslint-plugin-react/compare/v7.17.0...v7.19.0

)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Bumps [cross-env](https://github.com/kentcdodds/cross-env) from 6.0.3 to 7.0.2.
- [Release notes](https://github.com/kentcdodds/cross-env/releases)
- [Changelog](https://github.com/kentcdodds/cross-env/blob/master/CHANGELOG.md)
- [Commits](https://github.com/kentcdodds/cross-env/compare/v6.0.3...v7.0.2

)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Bumps [wicg-inert](https://github.com/WICG/inert) from 3.0.0 to 3.0.2.
- [Release notes](https://github.com/WICG/inert/releases)
- [Commits](https://github.com/WICG/inert/compare/v3.0.0...v3.0.2

)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Bumps [file-loader](https://github.com/webpack-contrib/file-loader) from 5.0.2 to 5.1.0.
- [Release notes](https://github.com/webpack-contrib/file-loader/releases)
- [Changelog](https://github.com/webpack-contrib/file-loader/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack-contrib/file-loader/compare/v5.0.2...v5.1.0

)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

* Change the string "hidden" to "blocked" in WebUI.

* update

Even if the container format is the same (.mp4), the codec could
be different and not playable in web browsers

- Dimensions at most 1920x1200
- Frame rate at most 60

* Bump cld3 from 3.2.6 to 3.3.0

Bumps [cld3](https://github.com/akihikodaki/cld3-ruby) from 3.2.6 to 3.3.0.
- [Release notes](https://github.com/akihikodaki/cld3-ruby/releases)
- [Commits](https://github.com/akihikodaki/cld3-ruby/compare/v3.2.6...v3.3.0

)

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

* Fix compatibility with cld3 3.3.0

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Co-authored-by: Eugen Rochko <eugen@zeonfederated.com>

* Change ActivityPub follower/following collections to not link first page

* Add support for hiding followers and following of remote users

* Switch to using a single `hide_collections` column

* Address code style remarks

Fix #9106

Bumps [doorkeeper](https://github.com/doorkeeper-gem/doorkeeper) from 5.2.3 to 5.3.1.
- [Release notes](https://github.com/doorkeeper-gem/doorkeeper/releases)
- [Changelog](https://github.com/doorkeeper-gem/doorkeeper/blob/master/CHANGELOG.md)
- [Commits](https://github.com/doorkeeper-gem/doorkeeper/compare/v5.2.3...v.5.3.1

)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

* Add support for links to public statuses in announcements to be opened in WebUI

* Please CodeClimate