[Breaking] Upgrade react-intl to v6

[emmenko]

No description provided.

[changeset-bot]

🦋 Changeset detected

Latest commit: 8f84c36

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 35 packages

Name	Type
@commercetools-applications/merchant-center-template-starter-typescript	Major
@commercetools-frontend/application-components	Major
@commercetools-applications/merchant-center-template-starter	Major
@commercetools-website/components-playground	Major
@commercetools-frontend/react-notifications	Major
@commercetools-frontend/jest-preset-mc-app	Major
@commercetools-frontend/application-shell	Major
@commercetools-frontend/mc-scripts	Major
@commercetools-local/visual-testing-app	Major
@commercetools-frontend/i18n	Major
@commercetools-local/playground	Major
@commercetools-website/custom-applications	Major
@commercetools-frontend/cypress	Major
@commercetools-backend/eslint-config-node	Major
@commercetools-backend/express	Major
@commercetools-backend/loggers	Major
@commercetools-frontend/actions-global	Major
@commercetools-frontend/application-config	Major
@commercetools-frontend/application-shell-connectors	Major
@commercetools-frontend/assets	Major
@commercetools-frontend/babel-preset-mc-app	Major
@commercetools-frontend/browser-history	Major
@commercetools-frontend/codemod	Major
@commercetools-frontend/constants	Major
@commercetools-frontend/create-mc-app	Major
@commercetools-frontend/eslint-config-mc-app	Major
@commercetools-frontend/jest-stylelint-runner	Major
@commercetools-frontend/l10n	Major
@commercetools-frontend/mc-dev-authentication	Major
@commercetools-frontend/mc-html-template	Major
@commercetools-frontend/notifications	Major
@commercetools-frontend/permissions	Major
@commercetools-frontend/sdk	Major
@commercetools-frontend/sentry	Major
@commercetools-frontend/url-utils	Major

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[github-actions]

Deploy preview for merchant-center-application-kit ready!

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