Add support of google/protobuf v5.x

[roxblnfk]

Allows google/protobuf 5.x, the same way #13 allowed 4.x — the constraint becomes
^3.7 || ^4.0 || ^5.0. No source change is needed: the DTOs come from
roadrunner-php/roadrunner-api-dto, which already requires
google/protobuf: ^4.31.1 || ^5.34.0, so this package's upper bound is the only thing that keeps
protobuf 5 out of an installation.

Why it matters downstream: spiral/roadrunner-bridge ^4.0 depends on this package, so an
application that wants the bridge together with google/protobuf 5.x cannot have both — Composer
either fails to resolve or downgrades protobuf to 4.x.

The test commit

RPCCentrifugoApiTest::testPublish compares the publish tags with === against ['baz', 'baf'],
which also compares key order. The iteration order of a protobuf MapField is an implementation
detail of the runtime and it changed: on google/protobuf 4.33 a two-entry map already iterates back
to front ([1 => 'baf', 0 => 'baz']), so the test fails there — before this constraint change,
on 4.x. The first commit sorts the entries by key so the assertion checks the tag values it means to
check. Without it CI on this branch would be red for a reason unrelated to protobuf 5.

Verification

php 8.4.23, full suite green in both matrix legs CI uses:

Leg	Resolved	Result
prefer-stable	google/protobuf v5.35.1, api-dto v1.14.1	121 tests, 425 assertions — OK
prefer-lowest	google/protobuf v4.33.6, api-dto v1.8.0	121 tests, 425 assertions — OK

Note on the static analysis job: it is already failing on 2.x independently of this PR. Psalm 6
(the require-dev constraint is >= 5.8) reports 48 MissingOverrideAttribute / ClassMustBeFinal
issues; the count is identical with and without this branch, so it is left alone here.

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🤖 Generated with Claude Code

Summary by CodeRabbit

• Compatibility

  • Broadened supported Protocol Buffers versions, including Protobuf v5.x.

• Bug Fixes

  • Fixed publish request tag validation to be consistent regardless of tag ordering.

• Tests

  • Updated the test bootstrap process and added a Protobuf compatibility shim to keep unit tests working across different Protobuf runtime variants.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 8fa1f8d6-533a-44d8-9105-8ccf45087991

📥 Commits

Reviewing files that changed from the base of the PR and between 1dc378c and a9126dd.

📒 Files selected for processing (4)

• phpunit.xml
• tests/Unit/Request/ConnectTest.php
• tests/Unit/Request/SubscribeTest.php
• tests/bootstrap.php

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📝 Walkthrough

Walkthrough

The Protobuf dependency constraint now includes v5.x, PHPUnit uses a compatibility bootstrap for repeated fields, and the publish RPC test normalizes tag-map ordering before comparison.

Changes

Protobuf compatibility

Layer / File(s)	Summary
Protobuf version constraint composer.json	Allows google/protobuf versions ^3.7, ^4.0, and ^5.0.
Test runtime compatibility phpunit.xml, tests/bootstrap.php, tests/Unit/Request/ConnectTest.php, tests/Unit/Request/SubscribeTest.php	Loads the test bootstrap, aliases the internal repeated-field class when needed, and updates request tests to use the public class name.
Stable publish tag comparison tests/Unit/RPCCentrifugoApiTest.php	Sorts publish request tags by key before test comparison.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• roadrunner-php/centrifugo#13: Modifies the google/protobuf Composer version constraint for newer Protobuf releases.

Suggested labels: enhancement

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main change: enabling google/protobuf v5.x support.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/protobuf-v5

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