Split QueueProducer to AsyncQueueProducer and SyncQueueProducer

[vjik]

Q	A
Is bugfix?	❌
New feature?	❌
Breaks BC?	✔️
Tests pass?	✔️

[codecov]

Codecov Report

❌ Patch coverage is 0% with 23 lines in your changes missing coverage. Please review.
✅ Project coverage is 0.00%. Comparing base (f2a0782) to head (462519d).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/SyncQueueProducer.php	0.00%	15 Missing ⚠️
src/AsyncQueueProducer.php	0.00%	8 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##             master    #323   +/-   ##
========================================
  Coverage      0.00%   0.00%           
  Complexity      380     380           
========================================
  Files            54      55    +1     
  Lines          1000    1012   +12     
========================================
- Misses         1000    1012   +12     

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