New APIs

• Added writeVector, writeVectorAll, readVector, readVectorAll for Coroutine::Socket (#3764) (@huanghantao)

Enhancement

• Added task_worker_num and dispatch_count for server->stats (#3771) (#3806) (@sy-records) (@matyhtf)
• Added extension dependencies, including json, mysqlnd, sockets (#3789) (@remicollet)
• Limited the minimum for uid server->bind is INT32_MIN (#3785) (@sy-records)
• Added compilation option for JSON decoder, Support negative offset (#3809) (@matyhtf)
• Added CURLOPT_TCP_NODELAY for Curl (swoole/library#65) (@sy-records) (@deminy)

Fixed

• Fixed sync client::connect error info (#3784) (@twose)
• Fixed the scandir function hooked (#3793) (@twose)
• Fixed some errors in the barrier (swoole/library#68) (@sy-records)

Kernel

• Optimized print-backtrace, using boost.stacktrace (#3788) (@matyhtf)