Update dependency firebase-tools to v9

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
firebase-tools	8.16.2 -> 9.0.1

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Release Notes

firebase/firebase-tools

v9.0.1

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• Fixes "checkForNode8 is not a function" issue in firebase deploy (#​2944).

v9.0.0

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• Breaking: Drops support for Node.js 8.
• Breaking: Disables deploys of the deprecated Node.js 8 runtime for Cloud Functions. Existing Node.js 8 functions will stop executing on 2021-03-15.
• Updates several dependencies that require Node.js >= 10 to fix npm audit issues.

v8.20.0

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• Shows missing documents in Emulator UI Firestore viewer.
• Better supports paths with special characters in Emulator UI Firestore viewer.
• Fixes generating email link from Admin SDK failing with Auth Emulator (#​2933).
• Fixes issue where multiple set-cookie headers were being proxied incorrectly in proxied responses through the Firebase Hosting emulator (#​2931).

v8.19.0

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• Adds Node.js 14 (Beta) runtime support to Cloud Functions for Firebase.

v8.18.1

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• Fixes issue where emulated functions were not receiving all expected headers.

v8.18.0

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• 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.

v8.17.0

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• Fixes issue where database:get would not completely finish writing to the output file.
• Updates Firebase Hosting emulator's code to not use the deprecated request module.
• Fixes race condition with disabling of background triggers (#​2857).
• Supports != and not-in queries in Firestore viewer in Emulator UI.
• Shows filtered values when sorted in the Firestore Emulator UI.
• Shows spaces in field keys in the Firestore Emulator UI.
• Fixes Auth Emulator UI not including project ID in API calls.
• Fixed an issue in the emulated auth widget UI where there would be an error if one of the opener frames was a cross-origin frame.
• Adds default RTDB instance creation and API enablement to firebase init.

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Affected Products

No changes between base commit (17a477c) and head commit (91b1230).

Test Logs

• Base (17a477c1): https://github.com/firebase/firebase-js-sdk/actions/runs/429280193
• Head (91b12300): https://github.com/firebase/firebase-js-sdk/actions/runs/429323169