v2.3.0

Changed

• BREAKING: php-http/discovery and the PSR-18/PSR-17 implementations are no longer required, so the collectors install without any HTTP client. To keep sending metrics, run composer require symfony/http-client nyholm/psr7 or composer require php-http/discovery, or pass your own PSR-18 client.
• Jmonitor builds its HTTP client on the first send, so collect(send: false) needs none, even with an API key.

Added

• Without php-http/discovery, symfony/http-client sends the metrics, and nyholm/psr7 builds the requests of a client given to the constructor.
• MissingHttpClientException is thrown, telling what to install, when no HTTP client is available to send the metrics.