Improvement of cache adapter

[koriym]

• それぞれのアダプターのキャッシュネームスペースを有効に
• FileSysmtemAdapterのキャッシュディレクトリ指定を有効に

[codecov]

Codecov Report

Merging #13 (02824c1) into 1.x (63a6d8a) will increase coverage by 64.40%.
The diff coverage is 100.00%.

@@              Coverage Diff               @@
##                1.x       #13       +/-   ##
==============================================
+ Coverage     35.59%   100.00%   +64.40%     
- Complexity       33        35        +2     
==============================================
  Files            22        21        -1     
  Lines           118        92       -26     
==============================================
+ Hits             42        92       +50     
+ Misses           76         0       -76     

Impacted Files	Coverage Δ
src/Annotation/CacheDir.php	100.00% <ø> (+100.00%)	⬆️
src/Annotation/CacheNamespace.php	100.00% <ø> (+100.00%)	⬆️
src/FilesystemAdapter.php	100.00% <100.00%> (ø)
src/PhpFileAdapter.php	100.00% <100.00%> (ø)
src/Psr6RedisModule.php	100.00% <100.00%> (+100.00%)	⬆️
src/ApcuAdapter.php	100.00% <0.00%> (ø)
src/CacheDirModule.php	100.00% <0.00%> (ø)
src/Psr6NullModule.php	100.00% <0.00%> (ø)
src/Psr6ArrayModule.php	100.00% <0.00%> (ø)
... and 17 more

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[koriym]

@NaokiTsuchiya Gentle reminder