bring Swoole Library to latest

[deminy]

This is to merge latest code from Swoole Library.

Removed:

• Dropped support for PHP 7 (from PHP 7.2 to 7.4).

Fixed:

• Fix return type of method \Swoole\FastCGI\HttpRequest::withBody(). (commit)
• Fix return value of method \Swoole\Server\Admin::start(). (commit)
• Fix method \Swoole\MultibyteStringObject::ipos(). (commit)
• Fix incorrect operator precedence used in method \Swoole\Coroutine\Admin::start(). (commit)
• Fix issue set_charset() should be called after confirming there aren't any connection errors library#164 : set_charset() should be called only if DB connection succeeds. (thanks @timaelliott )

Changed:

• MR The $fn callback of the map function adds the key parameter passed in… library#160 : Allow to pass array key/index to the callback function of function \Swoole\Coroutine::map(). (by @maxiaozhi )
• MR Support set options for redis database library#166 : Support configurable options for Redis. (by @sy-records )
• Improved type declarations and return types.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (375908d) 72.98% compared to head (e6605a5) 72.95%.
Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5224      +/-   ##
==========================================
- Coverage   72.98%   72.95%   -0.04%     
==========================================
  Files          69       69              
  Lines       14856    14858       +2     
==========================================
- Hits        10843    10839       -4     
- Misses       4013     4019       +6     

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[matyhtf]

@deminy The unit test in CI failed. There is a fatal error in PHP and needs to be solved.

[deminy]

Fixed in Swoole Library ( swoole/library@6a4ca52 ) and updated the PR. Thanks