chore(deps): update org.meshtastic:mqtt-client to v0.3.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.meshtastic:mqtt-client	0.2.0 → 0.3.0

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Release Notes

meshtastic/MQTTastic-Client-KMP (org.meshtastic:mqtt-client)

v0.3.0

Added

• Full MQTT 3.1.1 protocol support with seamless version auto-negotiation (#​36)
  • All 15 encoder/decoder functions accept a version parameter
  • 3.1.1 wire protocol differences: no properties, 1-byte CONNACK return codes, QoS-only SUBSCRIBE options, body-less DISCONNECT, no AUTH packet
  • negotiateVersion: Boolean = true config flag — tries V5.0 first, falls back to V3.1.1 on UNSUPPORTED_PROTOCOL_VERSION
  • negotiatedProtocolVersion public property on MqttClient
  • New MqttProtocolVersion public enum (V3_1_1, V5_0)

Fixed

• Correct decoding of 3.1.1-format CONNACK (2 bytes) when a V3.1.1-only broker rejects a V5.0 CONNECT (#​36)

Changed

• Bump Compose Multiplatform to 1.11.0-beta03, Material3 to 1.11.0-alpha07, Adaptive to 1.3.0-alpha07, compileSdk to 37 (#​31)
• Bump Kotlin to 2.3.21
• Bump Ktor ecosystem to 3.4.3
• Bump AGP to 9.2.0
• Bump Develocity plugin to 4.4.1

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