Fixes #15133

* Prepare Mastodon for zeitwerk autoloader (Rails 6)

Add inflections and rename/move a few classes.

In particular, app/lib/exceptions.rb and app/lib/sanitize_config.rb
were manually loaded while still in autoload paths.

* Add inflection for Url → URL

* Fix cache_collection crashing when given an empty collection

* Add tests

* Fix misuse of foreign_type

* Fix use of removed "add_template_helper"

* Use response.media_type instead of response.content_type in tests

* Fix CSV export controller test on Rails 6

Rails 6 sets a "filename*" field in the Content-Disposition header to
explicitly encode the filename as UTF-8.

This changes checks the first part of the Content-Disposition header so
it matches in both Rails 5 and Rails 6.

* Fix emoji formatting with Rails 6

* Make emoji output more idiomatic and robust

* Switch from redis-rails gem to built-in Rails redis cache storage

Bumps [rspec-rails](https://github.com/rspec/rspec-rails) from 4.1.0 to 5.0.0.
- [Release notes](https://github.com/rspec/rspec-rails/releases)
- [Changelog](https://github.com/rspec/rspec-rails/blob/main/Changelog.md)
- [Commits](https://github.com/rspec/rspec-rails/compare/v4.1.0...v5.0.0)

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Bumps [@babel/plugin-transform-runtime](https://github.com/babel/babel/tree/HEAD/packages/babel-plugin-transform-runtime) from 7.13.9 to 7.13.10.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.13.10/packages/babel-plugin-transform-runtime)

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Bumps [bundler-audit](https://github.com/postmodern/bundler-audit) from 0.7.0.1 to 0.8.0.
- [Release notes](https://github.com/postmodern/bundler-audit/releases)
- [Changelog](https://github.com/rubysec/bundler-audit/blob/master/ChangeLog.md)
- [Commits](https://github.com/postmodern/bundler-audit/compare/v0.7.0.1...v0.8.0)

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Bumps [@babel/runtime](https://github.com/babel/babel/tree/HEAD/packages/babel-runtime) from 7.13.9 to 7.13.10.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.13.10/packages/babel-runtime)

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Bumps [@babel/preset-env](https://github.com/babel/babel/tree/HEAD/packages/babel-preset-env) from 7.13.9 to 7.13.10.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.13.10/packages/babel-preset-env)

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Bumps [eslint](https://github.com/eslint/eslint) from 7.21.0 to 7.22.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/eslint/eslint/compare/v7.21.0...v7.22.0)

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Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 5.1.1 to 5.1.2.
- [Release notes](https://github.com/webpack-contrib/css-loader/releases)
- [Changelog](https://github.com/webpack-contrib/css-loader/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack-contrib/css-loader/compare/v5.1.1...v5.1.2)

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Bumps [@babel/core](https://github.com/babel/babel/tree/HEAD/packages/babel-core) from 7.13.8 to 7.13.10.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.13.10/packages/babel-core)

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Bumps [react-toggle](https://github.com/aaronshaf/react-toggle) from 4.1.1 to 4.1.2.
- [Release notes](https://github.com/aaronshaf/react-toggle/releases)
- [Changelog](https://github.com/aaronshaf/react-toggle/blob/master/CHANGELOG.md)
- [Commits](https://github.com/aaronshaf/react-toggle/commits)

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Remove locks from scheduled jobs

Bumps [pghero](https://github.com/ankane/pghero) from 2.7.4 to 2.8.0.
- [Release notes](https://github.com/ankane/pghero/releases)
- [Changelog](https://github.com/ankane/pghero/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ankane/pghero/compare/v2.7.4...v2.8.0)

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The exports page showed a different "CSV" capitalisation in the
"Bookmarks" row ("Csv") compared to the other rows ("CSV").
This was due to a referece to a translation string that does not exist,
`bookmarks.csv`, defaulting to the key's last segment in title case.

This issue was introduced in commit dcd86204 (PR #14956).

(h/t @meqif for helping with figuring out the bug)

Bumps [json-ld-preloaded](https://github.com/ruby-rdf/json-ld-preloaded) from 3.1.4 to 3.1.5.
- [Release notes](https://github.com/ruby-rdf/json-ld-preloaded/releases)
- [Commits](https://github.com/ruby-rdf/json-ld-preloaded/compare/3.1.4...3.1.5)

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Bumps [oj](https://github.com/ohler55/oj) from 3.11.2 to 3.11.3.
- [Release notes](https://github.com/ohler55/oj/releases)
- [Changelog](https://github.com/ohler55/oj/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/ohler55/oj/compare/v3.11.2...v3.11.3)

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Bumps [nokogiri](https://github.com/sparklemotion/nokogiri) from 1.11.1 to 1.11.2.
- [Release notes](https://github.com/sparklemotion/nokogiri/releases)
- [Changelog](https://github.com/sparklemotion/nokogiri/blob/main/CHANGELOG.md)
- [Commits](https://github.com/sparklemotion/nokogiri/compare/v1.11.1...v1.11.2)

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Bumps [parallel_tests](https://github.com/grosser/parallel_tests) from 3.5.1 to 3.5.2.
- [Release notes](https://github.com/grosser/parallel_tests/releases)
- [Changelog](https://github.com/grosser/parallel_tests/blob/master/CHANGELOG.md)
- [Commits](https://github.com/grosser/parallel_tests/compare/v3.5.1...v3.5.2)

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Bumps [ox](https://github.com/ohler55/ox) from 2.14.2 to 2.14.3.
- [Release notes](https://github.com/ohler55/ox/releases)
- [Changelog](https://github.com/ohler55/ox/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/ohler55/ox/compare/v2.14.2...v2.14.3)

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Bumps [aws-sdk-s3](https://github.com/aws/aws-sdk-ruby) from 1.89.0 to 1.91.0.
- [Release notes](https://github.com/aws/aws-sdk-ruby/releases)
- [Changelog](https://github.com/aws/aws-sdk-ruby/blob/version-3/gems/aws-sdk-s3/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-ruby/commits)

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Bumps [sidekiq-unique-jobs](https://github.com/mhenrixon/sidekiq-unique-jobs) from 6.0.25 to 7.0.4.
- [Release notes](https://github.com/mhenrixon/sidekiq-unique-jobs/releases)
- [Changelog](https://github.com/mhenrixon/sidekiq-unique-jobs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mhenrixon/sidekiq-unique-jobs/compare/v6.0.25...v7.0.4)

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Bumps [faker](https://github.com/faker-ruby/faker) from 2.16.0 to 2.17.0.
- [Release notes](https://github.com/faker-ruby/faker/releases)
- [Changelog](https://github.com/faker-ruby/faker/blob/master/CHANGELOG.md)
- [Commits](https://github.com/faker-ruby/faker/compare/v2.16.0...v2.17.0)

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* Bump sidekiq-unique-jobs from 6.0.25 to 7.0.1

Bumps [sidekiq-unique-jobs](https://github.com/mhenrixon/sidekiq-unique-jobs) from 6.0.25 to 7.0.1.
- [Release notes](https://github.com/mhenrixon/sidekiq-unique-jobs/releases)
- [Changelog](https://github.com/mhenrixon/sidekiq-unique-jobs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mhenrixon/sidekiq-unique-jobs/compare/v6.0.25...v7.0.1)

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* Fix migration being broken by sidekiq-unique-jobs update

* Fix migration script following API changes in dependency

* Fixup

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Co-authored-by: ThibG <thib@sitedethib.com>

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.9.1 to 1.11.0.
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop/rubocop/compare/v1.9.1...v1.11.0)

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Fixes #15849

Bumps [elliptic](https://github.com/indutny/elliptic) from 6.5.3 to 6.5.4.
- [Release notes](https://github.com/indutny/elliptic/releases)
- [Commits](https://github.com/indutny/elliptic/compare/v6.5.3...v6.5.4)

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Bumps [rspec-rails](https://github.com/rspec/rspec-rails) from 4.0.2 to 4.1.0.
- [Release notes](https://github.com/rspec/rspec-rails/releases)
- [Changelog](https://github.com/rspec/rspec-rails/blob/main/Changelog.md)
- [Commits](https://github.com/rspec/rspec-rails/compare/v4.0.2...v4.1.0)

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Bumps [react-textarea-autosize](https://github.com/Andarist/react-textarea-autosize) from 8.3.1 to 8.3.2.
- [Release notes](https://github.com/Andarist/react-textarea-autosize/releases)
- [Changelog](https://github.com/Andarist/react-textarea-autosize/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Andarist/react-textarea-autosize/compare/v8.3.1...v8.3.2)

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Bumps [ox](https://github.com/ohler55/ox) from 2.14.1 to 2.14.2.
- [Release notes](https://github.com/ohler55/ox/releases)
- [Changelog](https://github.com/ohler55/ox/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/ohler55/ox/compare/v2.14.1...v2.14.2)

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Bumps [parallel_tests](https://github.com/grosser/parallel_tests) from 3.5.0 to 3.5.1.
- [Release notes](https://github.com/grosser/parallel_tests/releases)
- [Changelog](https://github.com/grosser/parallel_tests/blob/master/CHANGELOG.md)
- [Commits](https://github.com/grosser/parallel_tests/compare/v3.5.0...v3.5.1)

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Bumps [webmock](https://github.com/bblimke/webmock) from 3.12.0 to 3.12.1.
- [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/v3.12.0...v3.12.1)

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Bumps [puma](https://github.com/puma/puma) from 5.2.1 to 5.2.2.
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](https://github.com/puma/puma/compare/v5.2.1...v5.2.2)

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Bumps [i18n-tasks](https://github.com/glebm/i18n-tasks) from 0.9.33 to 0.9.34.
- [Release notes](https://github.com/glebm/i18n-tasks/releases)
- [Changelog](https://github.com/glebm/i18n-tasks/blob/main/CHANGES.md)
- [Commits](https://github.com/glebm/i18n-tasks/compare/v0.9.33...v0.9.34)

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Bumps [@babel/runtime](https://github.com/babel/babel/tree/HEAD/packages/babel-runtime) from 7.13.8 to 7.13.9.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.13.9/packages/babel-runtime)

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Bumps [@babel/plugin-transform-runtime](https://github.com/babel/babel/tree/HEAD/packages/babel-plugin-transform-runtime) from 7.13.8 to 7.13.9.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.13.9/packages/babel-plugin-transform-runtime)

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Bumps [parallel_tests](https://github.com/grosser/parallel_tests) from 3.4.0 to 3.5.0.
- [Release notes](https://github.com/grosser/parallel_tests/releases)
- [Changelog](https://github.com/grosser/parallel_tests/blob/master/CHANGELOG.md)
- [Commits](https://github.com/grosser/parallel_tests/compare/v3.4.0...v3.5.0)

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Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 5.1.0 to 5.1.1.
- [Release notes](https://github.com/webpack-contrib/css-loader/releases)
- [Changelog](https://github.com/webpack-contrib/css-loader/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack-contrib/css-loader/compare/v5.1.0...v5.1.1)

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Bumps [@babel/preset-env](https://github.com/babel/babel/tree/HEAD/packages/babel-preset-env) from 7.13.8 to 7.13.9.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.13.9/packages/babel-preset-env)

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* Bump capistrano from 3.15.0 to 3.16.0

Bumps [capistrano](https://github.com/capistrano/capistrano) from 3.15.0 to 3.16.0.
- [Release notes](https://github.com/capistrano/capistrano/releases)
- [Commits](https://github.com/capistrano/capistrano/compare/v3.15.0...v3.16.0)

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* 3.16

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* Add tests

* Fix URL scanning in note length validator and preview card fetching

* Update twitter-text from 1.14 to 3.1.0

* Disable emoji parsing

* Properly depend on twitter-text for url detection

* Fix some URLs being wrongly detected client-side

* Add test for server-side validation of non-autolinkable URLs

* Fix server-side status length counting