App state resseting error fix

[tarampampam]

Q	A
Bug fix?	Yes
New feature?	No

Description

Added

• Event LoopErrorOccurredEvent (triggered on request processing exception)
• Listener SendExceptionToStderrListener for direct exception sending (as a string) into stderr
• Listener StopWorkerListener for worker stopping

Changed

• Default package configuration includes LoopErrorOccurredEvent event listeners: SendExceptionToStderrListener and StopWorkerListener
• When "debug mode" (app.debug) is not enabled - client will get only Internal server error string instead exception with stacktrace

Fixed

• Double response sending on request processing error (calling $psr7_client->respond and $psr7_client->getWorker()->error after that)

Fixes #42

Checklist

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I wrote unit tests for my code (if tests is required for my changes)
• [x] I have made changes in CHANGELOG.md file

[codecov-io]

Codecov Report

Merging #43 into master will decrease coverage by 0.81%. The diff coverage is 90.00%.

@@             Coverage Diff              @@
##             master      #43      +/-   ##
============================================
- Coverage     97.70%   96.89%   -0.82%     
- Complexity      105      117      +12     
============================================
  Files            23       26       +3     
  Lines           262      290      +28     
============================================
+ Hits            256      281      +25     
- Misses            6        9       +3     

Impacted Files	Coverage Δ	Complexity Δ
src/Listeners/SendExceptionToStderrListener.php	0.00% <0.00%> (ø)	2.00 <2.00> (?)
src/Events/LoopErrorOccurredEvent.php	100.00% <100.00%> (ø)	4.00 <4.00> (?)
src/Listeners/StopWorkerListener.php	100.00% <100.00%> (ø)	2.00 <2.00> (?)
src/Worker.php	95.45% <100.00%> (+0.64%)	26.00 <3.00> (+4.00)

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[tarampampam]

Released: https://github.com/avto-dev/roadrunner-laravel/releases/tag/v3.3.0