This gives us two assurances:

1. Highlight background colors, if not amazing on dark backgrounds in
   HTML documents, are at least readable
2. We know the exact contrast between foreground and background text in
   highlight elements —— think accessibility here in the future

This will allow us to see how highlighting features work on inverted
documents.

Fixed positioning is always relative to the viewport, so set the top
position of the fixed-position highlight controls to take the integration's
content container's vertical offset from the viewport into account.

Translation: ensure that highlight controls are not obscured by PDFjs'
top menu/controls bar.

These changes apply CSS classes SVG highlight rects, which will allow
for clustered-highlight styling.

With these changes:

* `hypothesis-highlight` elements always have a `hypothesis-highlight`
  CSS class, similarly to how SVG highlight rects have always had a
  `hypothesis-svg-highlight` class.
* CSS classes passed to `highlightRange` extend instead of replace CSS
  classes on `hypothesis-highlight` elements.
* CSS classes passed to `highlightRange` are also added to
  `hypothesis-svg-element` rects.

Use the same "vitalsource-content" frame ID for each VitalSource guest
frame. When a chapter navigation occurs, this will enable the sidebar to
associate the new guest, for the new chapter, with the `Frame` object in
the store for the previous guest.

This also gives the frame a more helpful human-readable ID for debugging
purposes.

Make the temporary page loaded during a VitalSource chapter navigation
more realistic by:

 1. Having a URL that is not `about:blank`.
 2. Having content with a `#page-content` element

Change (1) enables the `onDocumentReady` helper to realize that the initial
`about:blank` URL of the new chapter's iframe is about to navigate to a
different URL (the URL of the temporary page). See the
`hasBlankDocumentThatWillNavigate` function.

Change (2) allows the `onDocumentReady` callback in `VitalSourceInjector` to
detect that the temporary page is not the real chapter content, and skip loading
the client into it.

Together these two changes are steps towards more seamless handling of chapter
transitions in the sidebar.

Bumps [@npmcli/arborist](https://github.com/npm/cli/tree/HEAD/workspaces/arborist) from 5.6.2 to 6.1.1.
- [Release notes](https://github.com/npm/cli/releases)
- [Changelog](https://github.com/npm/cli/blob/latest/workspaces/arborist/CHANGELOG.md)
- [Commits](https://github.com/npm/cli/commits/arborist-v6.1.1/workspaces/arborist)

---
updated-dependencies:
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  dependency-type: direct:development
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Bumps [socket.io-parser](https://github.com/socketio/socket.io-parser) from 4.0.4 to 4.0.5.
- [Release notes](https://github.com/socketio/socket.io-parser/releases)
- [Changelog](https://github.com/socketio/socket.io-parser/blob/main/CHANGELOG.md)
- [Commits](https://github.com/socketio/socket.io-parser/compare/4.0.4...4.0.5)

---
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  dependency-type: indirect
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Signed-off-by: dependabot[bot] <support@github.com>

Note that the existing tests cover this after removing the null-check
for the `document_` argument when `err` is null.

Fix a bug in `onDocumentReady` where the callback would fire continuously with
an error after the frame either navigated to a cross-origin URL, or was removed
from its parent frame. Also emit a more appropriate error message in the case
where the frame is disconnected.

In the VitalSource integration this issue manifested in an `onDocumentReady`
callback firing continuously for the previous chapter's iframe when it was
removed from the document. This didn't cause an error because the callback
registered by the VS integration does nothing in that case, but it wasted
resources.

Note that customization was needed on the "clear results" button:

The cancel icon SVG (used by `CancelIcon`) is problematic — not a
  new issue — because it doesn't fill its viewbox and has to be
  manually sized. This prevents us from using the `icon` prop of the
  `Button` component for now. Tracked in
  https://github.com/hypothesis/frontend-shared/issues/675

Instead of drilling a single `AuthState` object cobbled together by
`HypothesisApp` down through a number of components — each of which make
use of different properties on the object in different ways — get what's
needed in each component using store selectors

Resolve related, potentially-confusing duplicate or misleading type names in
`version-data`.

Bumps [@typescript-eslint/parser](https://github.com/typescript-eslint/typescript-eslint/tree/HEAD/packages/parser) from 5.41.0 to 5.42.0.
- [Release notes](https://github.com/typescript-eslint/typescript-eslint/releases)
- [Changelog](https://github.com/typescript-eslint/typescript-eslint/blob/main/packages/parser/CHANGELOG.md)
- [Commits](https://github.com/typescript-eslint/typescript-eslint/commits/v5.42.0/packages/parser)

---
updated-dependencies:
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  dependency-type: direct:development
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When clicking an annotation in the sidebar that corresponds to a
different chapter of a VitalSource book than the one that is currently loaded,
navigate the book to the chapter associated with the annotation.

 - Add `goToCfi` and `goToURL` to the set of `<mosaic-book>` APIs that
   the client uses, and implementations of these in the VitalSource EPUB demo.

 - Add optional `navigateToSegment` method for integrations, which
   triggers a navigation to the segment (eg. EPUB chapter) of a document
   that matches an annotation's selectors.

 - Add new `navigateToSegment` sidebar => guest RPC call, which forwards
   to the integration's `navigateToSegment` implementation.

 - Change `FrameSyncService.scrollToAnnotation` to accept an annotation
   rather than just a tag, so the service can conveniently match the
   annotation against the EPUB chapter information for the guest

 - Add logic in `FrameSyncService.scrollToAnnotation` to invoke the
   `navigateToSegment` RPC method instead of `scrollToAnnotation` if the
   annotation is in a different segment of the document than is
   currently loaded.

   Once the navigation to the new segment has completed, the document
   still needs to be scrolled to the annotation. FrameSyncService
   service handles this by recording the ID of the annotation in a
   `_pendingScrollToId` field, and then performing the scroll once the
   annotation anchors.

Recent updates to Puppeteer created issues with caching locally and
GitHub Actions. See https://github.com/hypothesis/client/pull/4887#issuecomment-1295051454.

Rather than work around this, we've decided to try and simplify our tech stack
by removing this dependency and using the system's version of Chrome to run
tests. This does introduce a risk of issues due to behavior differences between
Chrome on one system and another, but it is mature and well-tested software, and
such issues have been rare in practice. We also had this mismatch for years
when running CI on Jenkins, which used an Alpine-packaged version of Chrome.

See also Slack discussion at https://hypothes-is.slack.com/archives/C1M8NH76X/p1667826360220049.

Bumps [@rollup/plugin-replace](https://github.com/rollup/plugins/tree/HEAD/packages/replace) from 5.0.0 to 5.0.1.
- [Release notes](https://github.com/rollup/plugins/releases)
- [Changelog](https://github.com/rollup/plugins/blob/master/packages/replace/CHANGELOG.md)
- [Commits](https://github.com/rollup/plugins/commits/url-v5.0.1/packages/replace)

---
updated-dependencies:
- dependency-name: "@rollup/plugin-replace"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...
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Bumps [axe-core](https://github.com/dequelabs/axe-core) from 4.5.0 to 4.5.1.
- [Release notes](https://github.com/dequelabs/axe-core/releases)
- [Changelog](https://github.com/dequelabs/axe-core/blob/v4.5.1/CHANGELOG.md)
- [Commits](https://github.com/dequelabs/axe-core/compare/v4.5.0...v4.5.1)

---
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- dependency-name: axe-core
  dependency-type: direct:development
  update-type: version-update:semver-patch
...
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Bumps [reselect](https://github.com/reduxjs/reselect) from 4.1.6 to 4.1.7.
- [Release notes](https://github.com/reduxjs/reselect/releases)
- [Changelog](https://github.com/reduxjs/reselect/blob/master/CHANGELOG.md)
- [Commits](https://github.com/reduxjs/reselect/compare/v4.1.6...v4.1.7)

---
updated-dependencies:
- dependency-name: reselect
  dependency-type: direct:development
  update-type: version-update:semver-patch
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Bumps [sass](https://github.com/sass/dart-sass) from 1.55.0 to 1.56.0.
- [Release notes](https://github.com/sass/dart-sass/releases)
- [Changelog](https://github.com/sass/dart-sass/blob/main/CHANGELOG.md)
- [Commits](https://github.com/sass/dart-sass/compare/1.55.0...1.56.0)

---
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- dependency-name: sass
  dependency-type: direct:development
  update-type: version-update:semver-minor
...
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Bumps [@sentry/browser](https://github.com/getsentry/sentry-javascript) from 7.17.2 to 7.17.4.
- [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/7.17.2...7.17.4)

---
updated-dependencies:
- dependency-name: "@sentry/browser"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...
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Bumps [@sentry/cli](https://github.com/getsentry/sentry-cli) from 2.8.0 to 2.8.1.
- [Release notes](https://github.com/getsentry/sentry-cli/releases)
- [Changelog](https://github.com/getsentry/sentry-cli/blob/master/CHANGELOG.md)
- [Commits](https://github.com/getsentry/sentry-cli/compare/2.8.0...2.8.1)

---
updated-dependencies:
- dependency-name: "@sentry/cli"
  dependency-type: direct:development
  update-type: version-update:semver-patch
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Bumps [tailwindcss](https://github.com/tailwindlabs/tailwindcss) from 3.2.1 to 3.2.2.
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/master/CHANGELOG.md)
- [Commits](https://github.com/tailwindlabs/tailwindcss/compare/v3.2.1...v3.2.2)

---
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- dependency-name: tailwindcss
  dependency-type: direct:development
  update-type: version-update:semver-patch
...
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When new annotations are loaded in the store, compare their segment information
(ie. which EPUB chapter they were made in) against that of the guest frames. If
there is no match, skip sending the annotation to the frame. This prevents
annotations made on chapters other than the current one from mis-anchoring
or being incorrectly marked as orphans.

Currently these "skipped" annotations will appear only in the sidebar after a
short delay. This is because logic elsewhere in the application expects all
loaded annotations to be marked as anchored or not and doesn't display them
until the anchoring status is set, or a 500ms timeout is reached. For these
skipped annotations, they don't appear until after the 500ms timeout expires.
This will be addressed separately.

Add a utility for comparing the document segment information captured in
an annotation against the segment info provided by a frame. This will be
used to send annotations on EPUBs to the guest frame only when the
corresponding chapter is loaded.

Collapse the cluster toolbar on initial render and allow user to toggle
it open and closed.

Fixes #4926

Allow an integration to declare whether or not it supports clustered
highlights. At this time, only HTML documents support the feature.

Fixes #4925

Add a simple controller and component for initializing and updating
styles associated with highlight clusters.

Enable the sidebar to know which segment of a document (eg. which chapter in an
EPUB) is loaded in a guest frame. The sidebar will then be able to use this to
know which annotations associated with the document it should send to the guest,
as well as whether to trigger a segment/chapter navigation when scrolling to an
annotation.