Enhancement: Extract NewLine value object

[localheinz]

This PR

• extracts a new line value object

[codecov]

Codecov Report

Merging #76 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##             master    #76   +/-   ##
=======================================
  Coverage       100%   100%           
- Complexity      112    114    +2     
=======================================
  Files            14     15    +1     
  Lines           329    331    +2     
=======================================
+ Hits            329    331    +2

Impacted Files	Coverage Δ	Complexity Δ
src/Format/NewLine.php	100% <100%> (ø)	4 <4> (?)
src/Format/Format.php	100% <100%> (ø)	11 <4> (-2)	⬇️
src/Format/Formatter.php	100% <100%> (ø)	6 <0> (ø)	⬇️
src/Format/Sniffer.php	100% <100%> (ø)	12 <2> (ø)	⬇️

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