Feature/qr codes config

[acelaya]

Closes #122

[codecov-commenter]

Codecov Report

Merging #123 (3fa7548) into develop (483876f) will increase coverage by 0.12%.
The diff coverage is 100.00%.

@@              Coverage Diff              @@
##             develop     #123      +/-   ##
=============================================
+ Coverage      97.97%   98.10%   +0.12%     
- Complexity       195      208      +13     
=============================================
  Files             63       67       +4     
  Lines            495      529      +34     
=============================================
+ Hits             485      519      +34     
  Misses            10       10              

Impacted Files	Coverage Δ
...tion/QrCode/DefaultErrorCorrectionConfigOption.php	100.00% <100.00%> (ø)
...Config/Option/QrCode/DefaultFormatConfigOption.php	100.00% <100.00%> (ø)
...Config/Option/QrCode/DefaultMarginConfigOption.php	100.00% <100.00%> (ø)
...c/Config/Option/QrCode/DefaultSizeConfigOption.php	100.00% <100.00%> (ø)
...nfig/Option/UrlShortener/ShortCodeLengthOption.php	100.00% <100.00%> (ø)
src/Config/Util/ConfigOptionsValidatorsTrait.php	100.00% <100.00%> (ø)

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