Update CI node.js versions to 20.x

[DellaBitta]

Discussion

Upgrade our CI scripts and workflows to work in Node 20.x.

• Updated workflows to use node 20.x across the board
• Updated tests which use the emualtor to connect to '127.0.0.1' explicitly instead of 'localhost', since newer versions of node treat localhost differently depending on the executing OS. For instance, localhost might resolve to the IPv6 address ::1, but that's not the address that the emulators bind to.
• Updated packages/rules-unit-testing/functions/package.json engines directive to define >=16 instead of requiring 16 explicitly.

Testing

CI

• Tested E2E Smoke Tests via temporary on: push: triggers.
• Temporarily mangled the getTestTasks function in scripts/ci-test/tasks.ts to always return the full lists of tests to run. This ensured that all tests were being executed by the test-changed workflows.
• I have not tested the Staging and Release scripts, but as far as I know they don't have any nuiances (Such as the emulator configuration of the the Auth, Firestore and Function tests).

API Changes

N/A.

[changeset-bot]

🦋 Changeset detected

Latest commit: 453d4f4

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

This PR includes changesets to release 0 packages

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[google-oss-bot]

Size Report ¹

Affected Products

• @firebase/auth

  Type	Base (e60188d)	Merge (bb6081e)	Diff
  browser	177 kB	177 kB	+38 B (+0.0%)
  esm5	231 kB	231 kB	+38 B (+0.0%)
  module	177 kB	177 kB	+38 B (+0.0%)

• @firebase/auth/internal

  Type	Base (e60188d)	Merge (bb6081e)	Diff
  browser	188 kB	188 kB	+38 B (+0.0%)
  esm5	244 kB	244 kB	+38 B (+0.0%)
  module	188 kB	188 kB	+38 B (+0.0%)

• bundle

  Type	Base (e60188d)	Merge (bb6081e)	Diff
  auth (GoogleFBTwitterGitHubPopup)	101 kB	101 kB	+19 B (+0.0%)

• firebase

  Type	Base (e60188d)	Merge (bb6081e)	Diff
  firebase-auth.js	147 kB	147 kB	+19 B (+0.0%)

Test Logs

• Base (e60188d): https://github.com/firebase/firebase-js-sdk/actions/runs/8086709249
• Merge (bb6081e): https://github.com/firebase/firebase-js-sdk/actions/runs/8189343173

1. https://storage.googleapis.com/firebase-sdk-metric-reports/a1LDaLtrbL.html

[google-oss-bot]

Size Analysis Report ¹

Affected Products

• @firebase/auth

  • getAuth

    Size

    Type	Base (e60188d)	Merge (bb6081e)	Diff
    size	72.4 kB	72.4 kB	+19 B (+0.0%)
    size-with-ext-deps	100 kB	100 kB	+19 B (+0.0%)

Test Logs

• Base (e60188d): https://github.com/firebase/firebase-js-sdk/actions/runs/8086709249
• Merge (bb6081e): https://github.com/firebase/firebase-js-sdk/actions/runs/8189343173

1. https://storage.googleapis.com/firebase-sdk-metric-reports/lHbYY53nc0.html

[github-actions]

Changeset File Check ⚠️

• Warning: This PR modifies files in the following packages but they have not been included in the changeset file:%0A - @firebase/auth%0A - @firebase/firestore%0A - @firebase/rules-unit-testing%0A%0A Make sure this was intentional.

[MarkDuckworth]

LGTM

[renkelvin]

Is this expected to be empty?

[hsubox76]

I think our changeset checker fails on finding no changeset file, which it shouldn't. But this PR doesn't need a changeset because it only affects tests and workflows.