Added listeners for FilesystemManager and LogManager

[tarampampam]

Description

Added

• Give the current App instance to FilesystemManager (listener RebindFilesystemManagerListener)

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 #77 (8d5ae0d) into master (d8643d6) will increase coverage by 0.37%.
The diff coverage is 90.47%.

@@             Coverage Diff              @@
##             master      #77      +/-   ##
============================================
+ Coverage     75.45%   75.82%   +0.37%     
- Complexity      321      331      +10     
============================================
  Files            61       63       +2     
  Lines           827      848      +21     
============================================
+ Hits            624      643      +19     
- Misses          203      205       +2     

Impacted Files	Coverage Δ
src/Defaults.php	100.00% <ø> (ø)
src/Listeners/RebindFilesystemManagerListener.php	88.88% <88.88%> (ø)
src/Listeners/FlushMonologStateListener.php	91.66% <91.66%> (ø)

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