Chore: Upgrade PHPStan to 2.x

[loks0n]

Summary

• Bump phpstan/phpstan from 1.* to ^2.0 (installed 2.1.51)
• Fix 3 errors surfaced at level 5 by the upgrade:
  • tests/e2e/Client.php: pass true to curl_setopt(..., CURLOPT_RETURNTRANSFER, ...) (param is bool, not int)
  • tests/RequestTest.php: drop redundant assertIsArray/assertIsInt on already-typed returns (method.alreadyNarrowedType)

Level stays at 5.

Test plan

• composer analyze passes
• composer test passes

🤖 Generated with Claude Code

[greptile-apps]

Greptile Summary

Upgrades PHPStan from 1.* to ^2.0 (2.1.51) and fixes the three errors it surfaces at level 5: a bool/int type mismatch on CURLOPT_RETURNTRANSFER in the e2e client and two redundant already-narrowed-type assertions in RequestTest.php. All changes are correct and minimal.

Confidence Score: 5/5

Safe to merge — straightforward dev-dependency upgrade with only test and lint fixes.

All changes are confined to dev dependencies and test files; no production logic was modified. The three fixes are correct responses to PHPStan 2.x diagnostics.

No files require special attention.

Important Files Changed

Filename	Overview
composer.json	Bumps phpstan/phpstan dev dependency from 1.* to ^2.0
composer.lock	Lock file updated to phpstan 2.1.51; minor Composer 2.9.0 format changes (stability-flags/platform-dev empty array → object, plugin-api-version bump)
tests/RequestTest.php	Removes two redundant assertions (assertIsArray / assertIsInt) that PHPStan 2.x flags as already-narrowed; no test coverage loss
tests/e2e/Client.php	Fixes CURLOPT_RETURNTRANSFER argument from int 1 to bool true to satisfy PHPStan 2.x type checking

_{Reviews (1): Last reviewed commit: "Chore: Upgrade PHPStan to 2.x" | Re-trigger Greptile}

[github-actions]

k6 benchmark

Throughput	Requests	Fail rate	p50	p95
8913 req/s	624005	0%	4.17 ms	11.12 ms