Improve contrast on tags
Fix a bug where the link hover color was not working in some cases

Add ES2015 polyfills required by new Sentry SDK

Add missing polyfills required by new Sentry SDK under IE 11 as per the
"Support for <= IE 11" section at
https://docs.sentry.io/platforms/javascript/#browser-table. In
particular the `String.prototype.includes` polyfill was missing and
causing the application to fail to load fully.

Fixes #1391

Bump commander from 3.0.1 to 3.0.2

Bump mocha from 6.2.0 to 6.2.1

Bumps [mocha](https://github.com/mochajs/mocha) from 6.2.0 to 6.2.1.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/v6.2.1/CHANGELOG.md)
- [Commits](https://github.com/mochajs/mocha/compare/v6.2.0...v6.2.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@babel/core](https://github.com/babel/babel) from 7.6.0 to 7.6.2.
- [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/v7.6.0...v7.6.2)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [aws-sdk](https://github.com/aws/aws-sdk-js) from 2.534.0 to 2.538.0.
- [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/v2.534.0...v2.538.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [commander](https://github.com/tj/commander.js) from 3.0.1 to 3.0.2.
- [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/v3.0.1...v3.0.2)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@babel/preset-env](https://github.com/babel/babel) from 7.6.0 to 7.6.2.
- [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/v7.6.0...v7.6.2)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [eslint](https://github.com/eslint/eslint) from 6.4.0 to 6.5.0.
- [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/v6.4.0...v6.5.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [dompurify](https://github.com/cure53/DOMPurify) from 2.0.2 to 2.0.3.
- [Release notes](https://github.com/cure53/DOMPurify/releases)
- [Commits](https://github.com/cure53/DOMPurify/compare/2.0.2...2.0.3)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bump codecov from 3.5.0 to 3.6.1

Bump cross-env from 5.2.1 to 6.0.0

Bumps [@octokit/rest](https://github.com/octokit/rest.js) from 16.28.9 to 16.30.1.
- [Release notes](https://github.com/octokit/rest.js/releases)
- [Commits](https://github.com/octokit/rest.js/compare/v16.28.9...v16.30.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [aws-sdk](https://github.com/aws/aws-sdk-js) from 2.532.0 to 2.534.0.
- [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/v2.532.0...v2.534.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [codecov](https://github.com/codecov/codecov-node) from 3.5.0 to 3.6.1.
- [Release notes](https://github.com/codecov/codecov-node/releases)
- [Commits](https://github.com/codecov/codecov-node/commits/v3.6.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [dompurify](https://github.com/cure53/DOMPurify) from 2.0.1 to 2.0.2.
- [Release notes](https://github.com/cure53/DOMPurify/releases)
- [Commits](https://github.com/cure53/DOMPurify/compare/2.0.1...2.0.2)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [cross-env](https://github.com/kentcdodds/cross-env) from 5.2.1 to 6.0.0.
- [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/v5.2.1...v6.0.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Enable Chrome debug logging

Bump sinon from 7.4.2 to 7.5.0

Enable Chrome logging to "chrome_debug.log" in the current workspace
directory to help track down a frequent cause of Jenkins CI build
failures.

See https://www.chromium.org/for-testers/enable-logging

Bump katex from 0.11.0 to 0.11.1

Bumps [katex](https://github.com/KaTeX/KaTeX) from 0.11.0 to 0.11.1.
- [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/v0.11.0...v0.11.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [sinon](https://github.com/sinonjs/sinon) from 7.4.2 to 7.5.0.
- [Release notes](https://github.com/sinonjs/sinon/releases)
- [Changelog](https://github.com/sinonjs/sinon/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sinonjs/sinon/commits)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Enable verbose Karma logging to help debug Jenkins CI build failures

Jenkins builds have been intermittently failing recently (eg. [1]) with an issue
where Chrome fails to connect to Karma after startup. The issue has
proven difficult to reproduce. Add additional logging to provide more
information.

[1] https://jenkins.hypothes.is/job/client/job/dependabot%252Fnpm_and_yarn%252Fwebsocket-1.0.30/1/console

Bump eslint from 6.3.0 to 6.4.0

Bumps [eslint](https://github.com/eslint/eslint) from 6.3.0 to 6.4.0.
- [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/v6.3.0...v6.4.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bump websocket from 1.0.29 to 1.0.30