Implement container to replace AngularJS's dependency injector for services

As a step in the migration away from Angular, use the local dependency
injector implementation to replace Angular's injection system in the
creation of service objects. The constructed services are still
registered with Angular for use by Angular components which depend upon
them. Once all Angular components have been migrated, and uses of
built-in Angular services (`$rootScope`) have been replaced, this step
can be removed.

The `viewFilter` function was renamed to `ViewFilter` because it relies
on access to `this` and the new injector detects whether a function is a
class or not based on the capitalization of the name.

Implement a dependency injection / Inversion of Control container that
can be used to replace Angular's dependency injection.

Improve a11y lint

- Remove unused `onClick` handler from <ul> this was redundant due to `onOpenChanged` prop and caused a lint issue. Note: there were also no previous test for this click handler in group-list-item-test.js

- Add alt attribute to <img> in group-list if there is an org name, otherwise its a decorative empty string

Build CSS bundles before running Karma

This is important for a11y tests which rely on having styles present.

This takes about ~1.2s on my machine currently. We can reclaim that time
in future by adding some caching to speed up the JS bundle build.

Bump karma-browserify from 6.1.0 to 7.0.0

Bump codecov from 3.6.2 to 3.6.4

Bump @sentry/browser from 5.11.1 to 5.11.2

Bumps [codecov](https://github.com/codecov/codecov-node) from 3.6.2 to 3.6.4.
- [Release notes](https://github.com/codecov/codecov-node/releases)
- [Commits](https://github.com/codecov/codecov-node/compare/v3.6.2...v3.6.4)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Improve a11y testing for AutocompleteList and TagEditor

- TagEditor test renders full AutocompleteList for end to end a11y test
- AutocompleteList now uses a `is-hidden` class rather than preact to hide itself. This was necessary to pass a11y lint.
- Change TagEditor to unset the activeIndex when adding tag
- Add `aria-label` to TagEditor <input> filed, `placeholder` attr not sufficient for lint
- Very slight color adjust on $grey-5 to keep 4.5:1 contrast spec

Move component test utilities to src/test-util/

Bump commander from 4.1.0 to 4.1.1

Bump puppeteer from 2.0.0 to 2.1.0

Merge pull request #1744 from hypothesis/dependabot/npm_and_yarn/babel-plugin-mockable-imports-1.7.0

Bumps [@babel/core](https://github.com/babel/babel) from 7.8.3 to 7.8.4.
- [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/v7.8.3...v7.8.4)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@babel/preset-env](https://github.com/babel/babel) from 7.8.3 to 7.8.4.
- [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/v7.8.3...v7.8.4)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@sentry/browser](https://github.com/getsentry/sentry-javascript) from 5.11.1 to 5.11.2.
- [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/5.11.1...5.11.2)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [karma-browserify](https://github.com/nikku/karma-browserify) from 6.1.0 to 7.0.0.
- [Release notes](https://github.com/nikku/karma-browserify/releases)
- [Commits](https://github.com/nikku/karma-browserify/compare/v6.1.0...v7.0.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@octokit/rest](https://github.com/octokit/rest.js) from 16.38.3 to 16.43.0.
- [Release notes](https://github.com/octokit/rest.js/releases)
- [Commits](https://github.com/octokit/rest.js/compare/v16.38.3...v16.43.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [babel-plugin-mockable-imports](https://github.com/robertknight/babel-plugin-mockable-imports) from 1.6.0 to 1.7.0.
- [Release notes](https://github.com/robertknight/babel-plugin-mockable-imports/releases)
- [Changelog](https://github.com/robertknight/babel-plugin-mockable-imports/blob/master/CHANGELOG.md)
- [Commits](https://github.com/robertknight/babel-plugin-mockable-imports/compare/v1.6.0...v1.7.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [dompurify](https://github.com/cure53/DOMPurify) from 2.0.7 to 2.0.8.
- [Release notes](https://github.com/cure53/DOMPurify/releases)
- [Commits](https://github.com/cure53/DOMPurify/compare/2.0.7...2.0.8)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [puppeteer](https://github.com/puppeteer/puppeteer) from 2.0.0 to 2.1.0.
- [Release notes](https://github.com/puppeteer/puppeteer/releases)
- [Commits](https://github.com/puppeteer/puppeteer/compare/v2.0.0...v2.1.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [commander](https://github.com/tj/commander.js) from 4.1.0 to 4.1.1.
- [Release notes](https://github.com/tj/commander.js/releases)
- [Changelog](https://github.com/tj/commander.js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/tj/commander.js/compare/v4.1.0...v4.1.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Chrome extension did not upload correctly, bumping version to repeat the travis build

Improve organizational clarity by separating tests from utility modules
used in tests, and also pave the way for re-using these utilities for UI
outside the sidebar app in future (eg. src/annotator/).

Improved tag editor (Part 2/2)

- Fix add new tag bug in Edge
- Remove tag-editor’s Chrome hack fix to limit suggestions to 20
- Add ARIA 1.1 Combobox  a11y model to TagEditor

Add accessibility unit test using axe-core

"default" is the default name for an a11y scenario unless one is
specified.

Remove the global react/display-name lint suppression for the
src/sidebar/components/test directory with individual line-level
suppressions.

The reason for having a global rule wasn't obvious when looking at
.eslintrc and there aren't that many occurrences.

Improve handling of text in RTL languages