test: coverage improvements and chores

[tcarrio]

This PR

• test: add shared base hook classes cases
• fix!: rename finallyAfter to finally in AbstractHook
• refactor: default to set NoOpProvider
• chore: cleanup commented code for $_SESSION
• test: can get version from Client
• feat: hook execution reversal
• test: cases for NoOpClient
• test: implement decapitalize unit tests

Related Issues

Fixes #54
Fixes #64
Fixes #55
Fixes #63
Fixes #57
Fixes #62
Fixes #59
Fixes #60

Notes

Follow-up Tasks

How to test

So many unit tests

[codecov-commenter]

Codecov Report

Merging #65 (b192128) into main (446648a) will increase coverage by 4.01%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##               main      #65      +/-   ##
============================================
+ Coverage     91.18%   95.19%   +4.01%     
+ Complexity      228      227       -1     
============================================
  Files            40       40              
  Lines           590      583       -7     
============================================
+ Hits            538      555      +17     
+ Misses           52       28      -24     

Impacted Files	Coverage Δ
src/OpenFeatureAPI.php	93.33% <100.00%> (+2.70%)	⬆️
src/OpenFeatureClient.php	99.13% <100.00%> (+1.61%)	⬆️
src/implementation/flags/NoOpClient.php	100.00% <0.00%> (+13.33%)	⬆️
src/implementation/common/StringHelper.php	100.00% <0.00%> (+50.00%)	⬆️
src/implementation/hooks/FloatHook.php	100.00% <0.00%> (+100.00%)	⬆️
src/implementation/hooks/ObjectHook.php	100.00% <0.00%> (+100.00%)	⬆️
src/implementation/hooks/StringHook.php	100.00% <0.00%> (+100.00%)	⬆️
src/implementation/hooks/BooleanHook.php	100.00% <0.00%> (+100.00%)	⬆️
... and 1 more

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