fix(deps): update dependency mqtt to v5.5.0

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
mqtt	5.4.0 -> 5.5.0

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Release Notes

mqttjs/MQTT.js (mqtt)

### [`v5.5.0`](https://togithub.com/mqttjs/MQTT.js/blob/HEAD/CHANGELOG.md#550-2024-03-18) [Compare Source](https://togithub.com/mqttjs/MQTT.js/compare/v5.4.0...v5.5.0) ##### Bug Fixes - **browser:** force closing client doesn't destroy websocket correctly ([#​1820](https://togithub.com/mqttjs/MQTT.js/issues/1820)) ([f9b1204](https://togithub.com/mqttjs/MQTT.js/commit/f9b1204d7e0a04bb809be6205091fd89281b1e73)), closes [#​1817](https://togithub.com/mqttjs/MQTT.js/issues/1817) - expose mqttjs version on `MqttClient.VERSION` ([#​1821](https://togithub.com/mqttjs/MQTT.js/issues/1821)) ([50776a7](https://togithub.com/mqttjs/MQTT.js/commit/50776a74c73c188f67faf399af90cfe0957a0e1f)) ##### Features - `timerVariant` option to choose between native and worker timers ([#​1818](https://togithub.com/mqttjs/MQTT.js/issues/1818)) ([547519d](https://togithub.com/mqttjs/MQTT.js/commit/547519daa8353a2d8a7fe9e4ae715601570b085f))

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