Bump autoprefixer from 9.8.4 to 9.8.5

Bump katex from 0.11.1 to 0.12.0

Bump sass from 1.26.9 to 1.26.10

Bumps [eslint-plugin-react-hooks](https://github.com/facebook/react/tree/HEAD/packages/eslint-plugin-react-hooks) from 4.0.5 to 4.0.8.
- [Release notes](https://github.com/facebook/react/releases)
- [Changelog](https://github.com/facebook/react/blob/master/packages/eslint-plugin-react-hooks/CHANGELOG.md)
- [Commits](https://github.com/facebook/react/commits/HEAD/packages/eslint-plugin-react-hooks)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [autoprefixer](https://github.com/postcss/autoprefixer) from 9.8.4 to 9.8.5.
- [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/9.8.4...9.8.5)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [aws-sdk](https://github.com/aws/aws-sdk-js) from 2.706.0 to 2.713.0.
- [Release notes](https://github.com/aws/aws-sdk-js/releases)
- [Changelog](https://github.com/aws/aws-sdk-js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-js/compare/v2.706.0...v2.713.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@babel/preset-env](https://github.com/babel/babel/tree/HEAD/packages/babel-preset-env) from 7.10.3 to 7.10.4.
- [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/v7.10.4/packages/babel-preset-env)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [eslint-plugin-react](https://github.com/yannickcr/eslint-plugin-react) from 7.20.1 to 7.20.3.
- [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/v7.20.1...v7.20.3)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [katex](https://github.com/KaTeX/KaTeX) from 0.11.1 to 0.12.0.
- [Release notes](https://github.com/KaTeX/KaTeX/releases)
- [Changelog](https://github.com/KaTeX/KaTeX/blob/master/CHANGELOG.md)
- [Commits](https://github.com/KaTeX/KaTeX/compare/v0.11.1...v0.12.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [sass](https://github.com/sass/dart-sass) from 1.26.9 to 1.26.10.
- [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/1.26.9...1.26.10)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

- Add additional type-checking and clarify comments
- Use ES6 conventions
- Structure code for readability

Bump whatwg-fetch from 3.0.0 to 3.1.0

Make text-color SASS variable names match conventions

- Adjust a few related mixins
- Adjust tests; make them less brittle on CSS classes
- Fix arrow alignment for narrow viewports

Fix layout of `AnnotationPublishControl` for Safari

* Add a wrapper element around the `Menu` component and apply styles
  to make sure it stretches/fills vertical space in parent
* Add utility class for small icon styling

Fixes #2302

Bumps [eslint-plugin-react-hooks](https://github.com/facebook/react/tree/HEAD/packages/eslint-plugin-react-hooks) from 4.0.4 to 4.0.5.
- [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/HEAD/packages/eslint-plugin-react-hooks)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bump puppeteer from 4.0.1 to 5.0.0

Bump preact from 10.4.4 to 10.4.5

Bump through2 from 4.0.1 to 4.0.2

Bump @sentry/browser from 5.18.1 to 5.19.0

Bump typescript from 3.9.5 to 3.9.6

Enable type checking for src/sidebar/components, but exclude all the files that have errors

Bumps [@babel/preset-react](https://github.com/babel/babel/tree/HEAD/packages/babel-preset-react) from 7.10.1 to 7.10.4.
- [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/v7.10.4/packages/babel-preset-react)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [eslint](https://github.com/eslint/eslint) from 7.3.1 to 7.4.0.
- [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/v7.3.1...v7.4.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@babel/core](https://github.com/babel/babel/tree/HEAD/packages/babel-core) from 7.10.3 to 7.10.4.
- [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/v7.10.4/packages/babel-core)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [puppeteer](https://github.com/puppeteer/puppeteer) from 4.0.1 to 5.0.0.
- [Release notes](https://github.com/puppeteer/puppeteer/releases)
- [Commits](https://github.com/puppeteer/puppeteer/compare/v4.0.1...v5.0.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [typescript](https://github.com/Microsoft/TypeScript) from 3.9.5 to 3.9.6.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](https://github.com/Microsoft/TypeScript/commits)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [through2](https://github.com/rvagg/through2) from 4.0.1 to 4.0.2.
- [Release notes](https://github.com/rvagg/through2/releases)
- [Commits](https://github.com/rvagg/through2/compare/v4.0.1...v4.0.2)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [whatwg-fetch](https://github.com/github/fetch) from 3.0.0 to 3.1.0.
- [Release notes](https://github.com/github/fetch/releases)
- [Commits](https://github.com/github/fetch/compare/v3.0.0...v3.1.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [preact](https://github.com/preactjs/preact) from 10.4.4 to 10.4.5.
- [Release notes](https://github.com/preactjs/preact/releases)
- [Commits](https://github.com/preactjs/preact/compare/10.4.4...10.4.5)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@sentry/browser](https://github.com/getsentry/sentry-javascript) from 5.18.1 to 5.19.0.
- [Release notes](https://github.com/getsentry/sentry-javascript/releases)
- [Changelog](https://github.com/getsentry/sentry-javascript/blob/master/CHANGELOG.md)
- [Commits](https://github.com/getsentry/sentry-javascript/compare/5.18.1...5.19.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Send notifications to Slack about client deployment events

These files typecheck without any changes required

Enable typechecking for the src/sidebar/components directory, but add
all files in that directory to an exclusion list of files which are not
checked. As errors are resolved, they can be removed from that list.
This gives us a "burndown" list that we can work our way through.