Add suffix extension types for FileRotationLogger

[sushichop]

This PR fixes #12 #27 .

suffixExtension was added to FileRotationLogger.

• .numbering (default option)

  • foo.log
  • foo.log1
  • foo.log2

• .date_uuid

  • foo.log
  • foo.log.20211118T1010Z_ecbaf8fe-3807-4056-b6a6-8a6c6b7b2c3e
  • foo.log.20211210T2238Z_7c64672e-8616-48d4-b780-66ca799d407b

Sample code is here.

let fileRotation = try! FileRotationLogger("com.example.yourapp.filerotation",
                                           fileURL: "./logs/foo.log")
fileRotation.suffixExtension = .date_uuid   // Default option is `.numbering`.
fileRotation.maxFileSize = 10 * 1024 * 1024
fileRotation.maxArchivedFilesCount = 2
fileRotation.delegate = delegate
let log = Puppy()
log.add(fileRotation)
log.info("INFO message")
log.warning("WARNING message")

[codecov]

Codecov Report

Merging #32 (40d2a68) into main (2c189c8) will decrease coverage by 3.41%.
The diff coverage is 69.69%.

@@            Coverage Diff             @@
##             main      #32      +/-   ##
==========================================
- Coverage   96.55%   93.13%   -3.42%     
==========================================
  Files          11       11              
  Lines         377      408      +31     
==========================================
+ Hits          364      380      +16     
- Misses         13       28      +15     

Impacted Files	Coverage Δ
Sources/Puppy/FileRotationLogger.swift	70.83% <69.35%> (-14.54%)	⬇️
Sources/Puppy/FileLogger.swift	92.22% <75.00%> (ø)

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