Releasing v4.19.0 (#130)

feat: add PSR-18/PSR-17 HTTP client injection support (#127)

* feat: add PSR-18/PSR-17 HTTP client injection support

Allow injecting a PSR-18 ClientInterface directly into ChargebeeClient
without implementing the Chargebee-specific HttpClientFactory interface.
PSR-17 request/stream factories can optionally be provided; when omitted,
php-http/discovery auto-discovers any installed implementation.

New: src/HttpClient/PsrClientAdapter.php wraps a PSR-18 client and builds
PSR-7 requests using injected or discovered PSR-17 factories.

The existing HttpClientFactory injection path and the default GuzzleFactory
are unchanged — fully backward compatible.

New dependencies (require):
  - php-http/discovery ^1.0
  - psr/http-factory ^1.0

Note: guzzlehttp/guzzle remains in require for v4.x compatibility.
Removing it is deferred to the next major version.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* Version bump

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Releasing v4.17.0 (#128)

Releasing v4.16.0 (#126)

Releasing v4.15.1. (#122)

* Releasing v4.15.1.

* test: document expected encoding when JSON arrays should not use indexed params

* fix: list fields to accept JSON objects with explicit numeric keys for JsonParamEncoder

* test: full test suits for JsonParamEncoder

* Minor refactor in CHANGELOG

Releasing v4.15.0 (#121)

* Releasing v4.15.0

* Update CHANGELOG.md

Releasing v4.14.0 (#119)

Releasing v4.13.0 (#117)

Releasing v3.51.0 (#118)

Fixed empty json attributes arrays being sent incorrectly (#116)