Updates for some performance increases, event streams, and fixes to MQTT v5 error reporting.

• Support for Paho C v1.3.16
  • Improved performance and lower latency for connect and publish operations.
• Added synchronous (blocking) and async event streams.
  • All events from the client flow through the stream: Connect, Connection Lost, Disconnected, Incoming Message
• Typeof Variable Byte Integer is u32 (not i32)
• PropertyType enum now supports Ord, PartialOrd, and Hash traits
• Added a tokio build feature for cargo, and a few tokio example apps. Enabing the feature simply builds the tokio examples. (The library is still fully runtime agnostic).
• Removed async-std from examples. Using smol instead.
• Properties::byte_len and Properties::get_at no longer cast *const MQTTProperties to *mut before calling C functions that are correctly declared const in the bindings.
• #244 Error handling for MQTT5 seems inconsistent
  • #264 Fix async MQTT5 error handling
  • Proper handling of v5 failures w/ Reason Codes
  • [Breaking] Reason Code Error variant now contains Properties from ACK packet
  • [Breaking] ACKs with a single reason code error generate an Error result, instead of an Ok() with a possible error code in it.
    • Subscribe Many & Unsubscribe Many still return Ok, possibly with a combination of success and error reason codes
• Bumped MSRV to Rust v1.75
• Bumped paho-mqtt-sys to v0.11
• Various new clippy warnings fixed
• #257 initialize mqtt version from create options instead of assuming
• #261 Remove undefined property from Cargo.toml

Fixed the build of the C library for C23 compilers (gcc 15+, etc)

• [#249)[https://github.com/eclipse-paho/paho.mqtt.rust/pull/249) Fixed the Paho C build for C23

Fixed TopicMapper

• TopicMatcher implements From(HashMap) for the value type.
• #243 TopicMatcher not matching parent when using '#' wildcard.

Minor updates to TopicFilter.

• Added some methods to TopicFilter:
  • Queries has_wildcards() and num_fields().
  • TryFrom for &str and String

Bug fixes.

• #240 Display trait for MqttVersion enumeration.
• #241 Restored the ability to turn off the ssl feature.

Update for Paho C v1.3.14 with support for UNIX-domain sockets. It also includes:

• Updated License to EPL-v2.0
• Bumped MSRV to Rust v1.73.0
• Bumped -sys to v0.10.0
  • Wrapping Paho C v1.3.14
    • Support for UNIX-domain sockets on local machine (*nix only)
  • build.rs builds optional UNIX sockets into Paho C on non-Windows systems (*nix)
• Reworked the Error type
  • Remove Paho and PahoDescr errors. De-nested them into the top-level.
  • Parsing the error messages from PahoDescr for new error types.
  • Removed Paho error constants. Now errors can be matched easily/directly.
• Token simplified to create an Option<Result<ServerResponse>> instead of individual components.
• Created new enumeration types:
  • MqttVersion
  • ConnectReturnCode (for MQTT v3.x)
  • QoS
• #181 Updated README.md with explanation on how to build for apple m1/x86_64
• #216 Deref QoS pointers for SubscribeMany and UnsubscribeMany in server response
• #224 Fix QoS 0 and 1 conversion
• #236 Make from_c_parts only visible inside crate

Some bug fixes and License update.

• Updated the License to EPL-v2.0
• Added some missing Eclipse Paho legal documents.
• Added TopicMatcher::insert_many()
• #216 Deref QoS pointers for SubscribeMany and UnsubscribeMany in server response
• #215 Now subscribe_many() returns an error if slices not the same length. Also added subscribe_many_same_qos() to the clients.

Fixes for topic matching

• TopicMatcher
  • Fixed a number of corner cases
  • Iterator optimized
  • Added prune() and shrink_to_fit(), and get_key_value()
• TopicFilter fixed corner cases
• Added stand-alone topic_matches() and topic_matches_iter() functions from PR #228

Upgrade to Paho C v1.3.13 to fix a number of bugs, including numerous issues with reconnecting to the broker.

• The -sys crate now wraps Paho C v1.3.13, fixing several issues, including crashes on reconnect callbacks.
• Made the C logs less verbose
• #203 AsyncClient::server_uri() getter.
• #202 Fix disconnect timeout (from sec to ms)

• #209 Forwarding trace/log statements from the Paho C library to the Rust logs
• Minor cleanup of subscriber examples.