fix: monolog 不存在时报错问题

[yansongda]

• fix: \Yansongda\Pay\Provider\AbstractProvider::call 方法返回值类型错误问题
• fix: monolog 不存在时报错问题（fix: 报 Class "Monolog\Logger" not found 错误 #833）

[netlify]

✅ Deploy Preview for pay-yansongda canceled.

Name	Link
🔨 Latest commit	42ece78
🔍 Latest deploy log	https://app.netlify.com/sites/pay-yansongda/deploys/64c08e6e18b405000891a538

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (c3ddfb2) 89.32% compared to head (42ece78) 89.32%.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #834   +/-   ##
=========================================
  Coverage     89.32%   89.32%           
  Complexity      760      760           
=========================================
  Files           219      219           
  Lines          2679     2679           
=========================================
  Hits           2393     2393           
  Misses          286      286           

Files Changed	Coverage Δ
src/Service/LoggerServiceProvider.php	100.00% <ø> (ø)
src/Provider/AbstractProvider.php	91.48% <100.00%> (ø)
src/Provider/Alipay.php	82.22% <100.00%> (ø)
src/Provider/Unipay.php	95.23% <100.00%> (ø)
src/Provider/Wechat.php	73.91% <100.00%> (ø)

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