Update README.md

[antimech]

README.md ready for 5.5!

[codecov-io]

Codecov Report

Merging #226 into master will increase coverage by 0.14%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #226      +/-   ##
============================================
+ Coverage      79.4%   79.55%   +0.14%     
- Complexity      206      226      +20     
============================================
  Files             7        7              
  Lines           709      719      +10     
============================================
+ Hits            563      572       +9     
- Misses          146      147       +1

Impacted Files	Coverage Δ	Complexity Δ
.../Mpociot/ApiDoc/Commands/GenerateDocumentation.php	68.67% <0%> (-0.04%)	56% <0%> (+8%)
src/Mpociot/ApiDoc/Postman/CollectionWriter.php	100% <0%> (ø)	12% <0%> (+6%)	⬆️
...rc/Mpociot/ApiDoc/Generators/AbstractGenerator.php	88.88% <0%> (+0.11%)	92% <0%> (+4%)	⬆️
src/Mpociot/ApiDoc/Generators/LaravelGenerator.php	86.11% <0%> (+0.19%)	43% <0%> (+2%)	⬆️

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[antimech]

#217 too