The `Delegator` events system was used for handling two kinds of event:

 - DOM events on highights and document elements
 - Custom events internal to the "annotator" module

The handling of DOM events has been moved into the `Guest` class, so
`Delegator` is now used only to subscribe to and publish internal
events. This commit removes the DOM event handling code.

There is an existing issue, noted in this commit, that the `destroy`
method only removed event handlers declared via the `events` property
and not those added later by `subscribe`.

This removes the last remaining usage of the `events` property of
`Delegator`, enabling that code to be removed.

The way that the `Guest` class listened to clicks on highlights and the
document involved a DOM event-listening abstraction in `Delegator` that
is no longer used for anything else in the code. This indirection made
it more complicated to follow how these events were handled.

This commit replaces the event handling for clicks, hovers and taps on
highlights and the page with regular DOM event listeners in the `Guest`
class.

Bumps [whatwg-fetch](https://github.com/github/fetch) from 3.4.0 to 3.4.1.
- [Release notes](https://github.com/github/fetch/releases)
- [Commits](https://github.com/github/fetch/compare/v3.4.0...v3.4.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [karma](https://github.com/karma-runner/karma) from 5.1.1 to 5.2.1.
- [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/v5.1.1...v5.2.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@sentry/browser](https://github.com/getsentry/sentry-javascript) from 5.21.4 to 5.22.3.
- [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/5.21.4...5.22.3)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [terser](https://github.com/terser/terser) from 5.2.1 to 5.3.0.
- [Release notes](https://github.com/terser/terser/releases)
- [Changelog](https://github.com/terser/terser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/terser/terser/compare/v5.2.1...v5.3.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [js-polyfills](https://github.com/inexorabletash/polyfill) from 0.1.42 to 0.1.43.
- [Release notes](https://github.com/inexorabletash/polyfill/releases)
- [Commits](https://github.com/inexorabletash/polyfill/compare/v0.1.42...v0.1.43)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@octokit/rest](https://github.com/octokit/rest.js) from 18.0.4 to 18.0.5.
- [Release notes](https://github.com/octokit/rest.js/releases)
- [Commits](https://github.com/octokit/rest.js/compare/v18.0.4...v18.0.5)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [dompurify](https://github.com/cure53/DOMPurify) from 2.0.14 to 2.0.15.
- [Release notes](https://github.com/cure53/DOMPurify/releases)
- [Commits](https://github.com/cure53/DOMPurify/compare/2.0.14...2.0.15)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [eslint](https://github.com/eslint/eslint) from 7.8.0 to 7.8.1.
- [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/v7.8.0...v7.8.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [aws-sdk](https://github.com/aws/aws-sdk-js) from 2.743.0 to 2.747.0.
- [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/v2.743.0...v2.747.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@babel/core](https://github.com/babel/babel/tree/HEAD/packages/babel-core) from 7.11.5 to 7.11.6.
- [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/v7.11.6/packages/babel-core)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

It turns out that there is an implicit requirement that `Host` call its
parent constructor _after_ the `.annotator-frame` element has been
created and added to the DOM. This needs refactoring to avoid the hidden
dependency, but I'm leaving that for later to focus on the CoffeeScript
=> JS conversion here.

Rewrite the config param filtering to make it more obvious what is going
on and extract a couple of helper functions to make the test more
readable.

There was no good reason for it to be in the middle of the function.

This is a straightforward conversion with decaffeinate, followed by
manual fixups of lint errors etc.

Help user see what part of an entered tag is a match for a suggested tag

Change the matching logic for determining whether a given suggested tag
(`tag`) matches the currently-typed tag field text (`query`).

Formerly, `tag` would match `query` if `tag` were a substring of `query`
in any position. However, this creates a lot of noise in the matches and
is not commonly what folks are after.

Now, `tag` will match `query` if:

* `tag` starts with `query` OR
* `query` occurs within `tag` after a word boundary or a non-word
   character

Thus, a `query` of "app":

* Would match the `tag` "apple"
* Would match the `tag` "crab apple" ("app" occurs after a word boundary)
* Would match the `tag` "crab.apple" ("app" occurs after non-word char)
* Would NOT match the `tag` "crabapple"

- Refactor `range-js-test` and remove specific testing of internal functions such as `findChild` and `nodeFromXPathFallback`.

- `nodeFromXPath` ported code does not contain any code path for XML handling as the coffeescript previously did. This code was however previously untested and difficult to reproduce in practice. It was likely was never or rarely used and is over 6 years old.

Bumps [bl](https://github.com/rvagg/bl) from 4.0.2 to 4.0.3.
- [Release notes](https://github.com/rvagg/bl/releases)
- [Commits](https://github.com/rvagg/bl/compare/v4.0.2...v4.0.3)
Signed-off-by: dependabot[bot] <support@github.com>

Bumps [preact](https://github.com/preactjs/preact) from 10.4.7 to 10.4.8.
- [Release notes](https://github.com/preactjs/preact/releases)
- [Commits](https://github.com/preactjs/preact/compare/10.4.7...10.4.8)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [commander](https://github.com/tj/commander.js) from 6.0.0 to 6.1.0.
- [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/v6.0.0...v6.1.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [mocha](https://github.com/mochajs/mocha) from 8.1.1 to 8.1.3.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mochajs/mocha/compare/v8.1.1...v8.1.3)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

For features going forward, nest in a single `experimental` object so
that `experimental` features can be white-flagged in one go in, e.g.,
via

- Don't close sidebar on click if the click is on highlighted annotation
  text. Fixes a judder (Fixes #2372)
- Don't close sidebar on click if `closeSidebarOnDocumentClick` is
  falsey (for side-by-side support)

Bumps [aws-sdk](https://github.com/aws/aws-sdk-js) from 2.739.0 to 2.743.0.
- [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/v2.739.0...v2.743.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [eslint](https://github.com/eslint/eslint) from 7.7.0 to 7.8.0.
- [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/v7.7.0...v7.8.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [prettier](https://github.com/prettier/prettier) from 2.1.0 to 2.1.1.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/master/CHANGELOG.md)
- [Commits](https://github.com/prettier/prettier/compare/2.1.0...2.1.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@octokit/rest](https://github.com/octokit/rest.js) from 18.0.3 to 18.0.4.
- [Release notes](https://github.com/octokit/rest.js/releases)
- [Commits](https://github.com/octokit/rest.js/compare/v18.0.3...v18.0.4)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [dompurify](https://github.com/cure53/DOMPurify) from 2.0.12 to 2.0.14.
- [Release notes](https://github.com/cure53/DOMPurify/releases)
- [Commits](https://github.com/cure53/DOMPurify/compare/2.0.12...2.0.14)
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 7.11.0 to 7.11.5.
- [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/v7.11.5/packages/babel-preset-env)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [@babel/core](https://github.com/babel/babel/tree/HEAD/packages/babel-core) from 7.11.4 to 7.11.5.
- [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/v7.11.5/packages/babel-core)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Remove logic for handling swipe gestures on the sidebar's toggle button.
Trying to perform a swipe on a target as small as the toggle button is
difficult and it doesn't offer advantages over just tapping the button
to open and close. Behavior that _might_ be useful is being able to
two-finger swipe on the whole sidebar to open or close it, but this conflicts
with the browser's own swipe gesture handling. Just remove it entirely
for now.

 - Remove swipe gesture handling

 - Remove unnecessary use of jQuery

 - Ensure that the `_setupGestures` code path is exercised by tests

This is a direct conversion with decaffeinate [1] followed by a manual
line-by-line review to remove unnecessary `return` statements, fix lint
errors and ensure consistency with our conventions.

[1] https://github.com/decaffeinate/decaffeinate