- Add a new parameter to urlFromLinkTag called "type" to allow urlFromLinkTag to get the client url as well as sidebar and notebook urls. This eliminates the need to have a custom clientUrl method in settings.js

- urlFromLinkTag() will also soon be needed outside of settings.js as part of a future refactor to move logic into getConfig() which determines if the browser extension context is true.

- Remove the deprecated "coerce" option from hostPageSetting as this is now moved to configDefinitions

Previously, coerce was passed to the hostPageSetting. Moving the logic up into getConfig allows any setting to have a coerce method, not just settings pulled from hostPageSetting. Eventually, other settings may need coerce logic such as showHighlights.

Bumps [aws-sdk](https://github.com/aws/aws-sdk-js) from 2.927.0 to 2.931.0.
- [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/v2.927.0...v2.931.0)

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Bumps [core-js](https://github.com/zloirock/core-js/tree/HEAD/packages/core-js) from 3.14.0 to 3.15.0.
- [Release notes](https://github.com/zloirock/core-js/releases)
- [Changelog](https://github.com/zloirock/core-js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/zloirock/core-js/commits/v3.15.0/packages/core-js)

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Bumps [@sentry/browser](https://github.com/getsentry/sentry-javascript) from 6.7.0 to 6.7.1.
- [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/6.7.0...6.7.1)

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Bumps [gulp-changed](https://github.com/sindresorhus/gulp-changed) from 4.0.2 to 4.0.3.
- [Release notes](https://github.com/sindresorhus/gulp-changed/releases)
- [Commits](https://github.com/sindresorhus/gulp-changed/compare/v4.0.2...v4.0.3)

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Bumps [@babel/preset-react](https://github.com/babel/babel/tree/HEAD/packages/babel-preset-react) from 7.13.13 to 7.14.5.
- [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/v7.14.5/packages/babel-preset-react)

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Bumps [@babel/core](https://github.com/babel/babel/tree/HEAD/packages/babel-core) from 7.14.5 to 7.14.6.
- [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/v7.14.6/packages/babel-core)

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Bumps [postcss](https://github.com/postcss/postcss) from 8.3.3 to 8.3.5.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss/compare/8.3.3...8.3.5)

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Bumps [mocha](https://github.com/mochajs/mocha) from 9.0.0 to 9.0.1.
- [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/v9.0.0...v9.0.1)

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Bumps [eslint](https://github.com/eslint/eslint) from 7.28.0 to 7.29.0.
- [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/v7.28.0...v7.29.0)

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Bumps [sass](https://github.com/sass/dart-sass) from 1.34.1 to 1.35.1.
- [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/1.34.1...1.35.1)

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Bumps [typescript](https://github.com/Microsoft/TypeScript) from 4.3.2 to 4.3.4.
- [Release notes](https://github.com/Microsoft/TypeScript/releases)
- [Commits](https://github.com/Microsoft/TypeScript/compare/v4.3.2...v4.3.4)

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Components that appear in the sidebar are currently responsible for
applying their own bottom-margin to keep things equally spaced.

Margins (spacing) should eventually be applied by the parent element,
but until then, a utility class will ensure that we maintain the same
spacing, as we move to using shared components.

`showdown` does not enable `strikethrough` support by default.

Add associated test and update test module for modern conventions.

Fixes https://github.com/hypothesis/support/issues/141

`ignoreOtherConfiguration` option causes other JSON hypothesis
configurations included in the host page to be disregarded.

In addition, by making `window.hypothesisConfig` non-configurable and
non-writable we make sure that other `window.hypothesisConfig` defined
afterwards can't override it. `via` has the ability to define a
non-configurable `window.hypothesisConfig` before any other.

If `ignoreOtherConfiguration` is used JSON configurations should be
ignored.

Part of https://github.com/hypothesis/viahtml/pull/192

Bumps [@babel/preset-env](https://github.com/babel/babel/tree/HEAD/packages/babel-preset-env) from 7.14.4 to 7.14.5.
- [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/v7.14.5/packages/babel-preset-env)

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Bumps [mocha](https://github.com/mochajs/mocha) from 8.4.0 to 9.0.0.
- [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/v8.4.0...v9.0.0)

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Bumps [aws-sdk](https://github.com/aws/aws-sdk-js) from 2.922.0 to 2.927.0.
- [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/v2.922.0...v2.927.0)

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Bumps [@actions/core](https://github.com/actions/toolkit/tree/HEAD/packages/core) from 1.3.0 to 1.4.0.
- [Release notes](https://github.com/actions/toolkit/releases)
- [Changelog](https://github.com/actions/toolkit/blob/main/packages/core/RELEASES.md)
- [Commits](https://github.com/actions/toolkit/commits/HEAD/packages/core)

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Bumps [@sentry/browser](https://github.com/getsentry/sentry-javascript) from 6.5.1 to 6.7.0.
- [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/6.5.1...6.7.0)

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Bumps [postcss](https://github.com/postcss/postcss) from 8.3.0 to 8.3.3.
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/postcss/postcss/compare/8.3.0...8.3.3)

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Bumps [@octokit/rest](https://github.com/octokit/rest.js) from 18.5.6 to 18.6.0.
- [Release notes](https://github.com/octokit/rest.js/releases)
- [Commits](https://github.com/octokit/rest.js/compare/v18.5.6...v18.6.0)

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Bumps [dompurify](https://github.com/cure53/DOMPurify) from 2.2.8 to 2.2.9.
- [Release notes](https://github.com/cure53/DOMPurify/releases)
- [Commits](https://github.com/cure53/DOMPurify/compare/2.2.8...2.2.9)

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Bumps [@babel/core](https://github.com/babel/babel/tree/HEAD/packages/babel-core) from 7.14.3 to 7.14.5.
- [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/v7.14.5/packages/babel-core)

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Bumps [y18n](https://github.com/yargs/y18n) from 3.2.1 to 3.2.2.
- [Release notes](https://github.com/yargs/y18n/releases)
- [Changelog](https://github.com/yargs/y18n/blob/master/CHANGELOG.md)
- [Commits](https://github.com/yargs/y18n/commits)

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Bumps [karma](https://github.com/karma-runner/karma) from 6.3.3 to 6.3.4.
- [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/v6.3.3...v6.3.4)

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The main difference is that configFrom returned config key:value pairs, but now configDefinitions returns key:object pairs. Where the object may hold additional flags and methods for each specific config value. Currently the only method included is valueFn() which gets the value from its source. Others will follow.

Additionally:
- Remove `experimental` from configDefinitions/configFrom as it is not used

Comments without a double `**` are not parsed as JSDoc.

Convert the `initialState` functions in store modules to `const` values
for modules where the state is static (ie. does not depend on
`settings`) and add better type documentation.

Most references to the state are not currently type-checked, but they
will be in future. In the interim this serves as useful documentation
for humans.

`HTMLMetadata` read `document.baseURI` only once in the constructor,
risking issues to the cached value becoming stale. `document.baseURI` is
available in all supported browsers and is easily mocked where needed in
tests, so just always read the current value when needed.

Also remove a `normalizeURI` test seam that was unused. If we did want
to mock this in future we'd use the `$imports` object as we do in other
tests.

Bumps [eslint](https://github.com/eslint/eslint) from 7.27.0 to 7.28.0.
- [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/v7.27.0...v7.28.0)

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