• Adds i18n rewrites to the Firebase Hosting emulator.
• Changes Auth Emulator IDP sign-in to always return an access token.
• Adds new Cloud Functions regions and new versions of firebase-functions and firebase-admin to ext:dev:init templates.
• Fixes unclear error messages when trying to enable APIs that require billing on projects without a billing account.
• Adds support for specifying the service account a Cloud Function should run as, by setting the serviceAccount in functions.runWith().
• Fixes Firestore Emulator listCollectionId not returning collections with nested docs.
• Fixes Firestore Emulator listDocuments with showMissing returning 500 errors.
• Adds additional logging when deploying to a Firebase Hosting preview channel.