rocketmq-client-cpp-2.1.0

This release support message trace for sending messages in sync model and consuming messages by push model. The stability of the core is further improved.

New Future:

• [ISSUE-276] Add trace message for pub and sub.
• [ISSUE-281] Add trace message shift for C style APIs.

Improvement:

• [ISSUE-274] Fix the heap-use-after-free risk caused by direct deconstruction when it is not used after initialization.

Bug:

• [ISSUE-283] Send message back failed some time because the timeout was set too short.