Translator memory leak fixed

[tarampampam]

Description

Added

• Listener FlushTranslatorCacheListener for memory leak fixing on Translator implementation

Related PR: laravel/octane#416

Checklist

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

[codecov]

Codecov Report

Merging #70 (305b552) into master (4f2eabc) will increase coverage by 0.18%.
The diff coverage is 90.00%.

@@             Coverage Diff              @@
##             master      #70      +/-   ##
============================================
+ Coverage     74.90%   75.09%   +0.18%     
- Complexity      305      310       +5     
============================================
  Files            59       60       +1     
  Lines           797      807      +10     
============================================
+ Hits            597      606       +9     
- Misses          200      201       +1     

Impacted Files	Coverage Δ
src/Defaults.php	100.00% <ø> (ø)
src/Listeners/FlushTranslatorCacheListener.php	90.00% <90.00%> (ø)

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