Bump redux from 4.0.1 to 4.0.4

Bump @octokit/rest from 16.28.2 to 16.28.4

Bump karma from 4.1.0 to 4.2.0

Bump preact from 10.0.0-beta.3 to 10.0.0-rc.0

Bump focus-visible from 5.0.1 to 5.0.2

Bumps [redux](https://github.com/reduxjs/redux) from 4.0.1 to 4.0.4.
- [Release notes](https://github.com/reduxjs/redux/releases)
- [Changelog](https://github.com/reduxjs/redux/blob/master/CHANGELOG.md)
- [Commits](https://github.com/reduxjs/redux/compare/v4.0.1...v4.0.4)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@octokit/rest](https://github.com/octokit/rest.js) from 16.28.2 to 16.28.4.
- [Release notes](https://github.com/octokit/rest.js/releases)
- [Commits](https://github.com/octokit/rest.js/compare/v16.28.2...v16.28.4)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [karma](https://github.com/karma-runner/karma) from 4.1.0 to 4.2.0.
- [Release notes](https://github.com/karma-runner/karma/releases)
- [Changelog](https://github.com/karma-runner/karma/blob/master/CHANGELOG.md)
- [Commits](https://github.com/karma-runner/karma/compare/v4.1.0...v4.2.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [preact](https://github.com/developit/preact) from 10.0.0-beta.3 to 10.0.0-rc.0.
- [Release notes](https://github.com/developit/preact/releases)
- [Commits](https://github.com/developit/preact/compare/10.0.0-beta.3...10.0.0-rc.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [focus-visible](https://github.com/WICG/focus-visible) from 5.0.1 to 5.0.2.
- [Release notes](https://github.com/WICG/focus-visible/releases)
- [Commits](https://github.com/WICG/focus-visible/compare/v5.0.1...v5.0.2)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Migrate `LoggedOutMessage` to preact

- Rename from `loggedout-message` to `logged-out-message` for consistency

[Security] Bump lodash from 4.17.11 to 4.17.14

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.11 to 4.17.14. **This update includes security fixes.**
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](https://github.com/lodash/lodash/compare/4.17.11...4.17.14)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bump eslint from 5.16.0 to 6.0.1

Bump @babel/preset-env from 7.4.5 to 7.5.0

 - Suppress all warnings about use of `hasOwnProperty`. Some of these
   warnings *are* valid issues. I've decided not to block the ESLint
   upgrade on them however.
 - Suppress two other specific warnings

Merge with `yarn.lock` updates on master.

This is the result of running:

    yarn upgrade -P @babel/core @babel/preset-env

Convert `<top-bar>` component to (P)react

 - Clarify or reword a few comments and test descriptions

 - Pluralize "annotations" correctly in the real-time update notification
   icon's tooltip

Fix rendering bug in moderation-banner component

Bump autoprefixer from 9.6.0 to 9.6.1

Bumps [@babel/preset-env](https://github.com/babel/babel) from 7.4.5 to 7.5.0.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/compare/v7.4.5...v7.5.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [eslint](https://github.com/eslint/eslint) from 5.16.0 to 6.0.1.
- [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/v5.16.0...v6.0.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bump unorm from 1.5.0 to 1.6.0

Bump @babel/core from 7.4.5 to 7.5.0

Bump browserify from 16.2.3 to 16.3.0

Bump websocket from 1.0.28 to 1.0.29

Bumps [unorm](https://github.com/walling/unorm) from 1.5.0 to 1.6.0.
- [Release notes](https://github.com/walling/unorm/releases)
- [Commits](https://github.com/walling/unorm/compare/v1.5.0...v1.6.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 9.6.0 to 9.6.1.
- [Release notes](https://github.com/postcss/autoprefixer/releases)
- [Changelog](https://github.com/postcss/autoprefixer/blob/master/CHANGELOG.md)
- [Commits](https://github.com/postcss/autoprefixer/compare/9.6.0...9.6.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [browserify](https://github.com/browserify/browserify) from 16.2.3 to 16.3.0.
- [Release notes](https://github.com/browserify/browserify/releases)
- [Changelog](https://github.com/browserify/browserify/blob/master/changelog.markdown)
- [Commits](https://github.com/browserify/browserify/compare/v16.2.3...v16.3.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@babel/core](https://github.com/babel/babel) from 7.4.5 to 7.5.0.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/compare/v7.4.5...v7.5.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [websocket](https://github.com/theturtle32/WebSocket-Node) from 1.0.28 to 1.0.29.
- [Release notes](https://github.com/theturtle32/WebSocket-Node/releases)
- [Changelog](https://github.com/theturtle32/WebSocket-Node/blob/master/CHANGELOG.md)
- [Commits](https://github.com/theturtle32/WebSocket-Node/compare/v1.0.28...v1.0.29)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Convert `AnnotationHeader` and its allies to preact

Previously, this component rendered either a `div` or an `a` depending
on context. This makes styling and whatnot impractical.