Merge branch 'master' into 3-update-mirador

.eslintrc

.github/workflows/node.js.yml

README.md

__tests__/fixtures/version-2/related.json

__tests__/integration/mirador/companion_windows.test.js

__tests__/integration/mirador/index.html

__tests__/integration/mirador/invalid-api-response.test.js

__tests__/integration/mirador/language_switching.test.js

__tests__/integration/mirador/plugins/add.test.js

...sts__/integration/mirador/plugins/companionWindow.test.js

__tests__/integration/mirador/plugins/priority.test.js

__tests__/integration/mirador/plugins/state.test.js

__tests__/integration/mirador/plugins/validate.test.js

__tests__/integration/mirador/plugins/wrap.test.js

__tests__/integration/mirador/thumbnail-navigation.test.js

__tests__/integration/mirador/window_actions.test.js

__tests__/src/components/AccessTokenSender.test.js

__tests__/src/components/LabelValueMetadata.test.js

__tests__/src/components/ManifestRelatedLinks.test.js

__tests__/src/components/MiradorMenuButton.test.js