Regenerate gemspec for version 0.6.3
Regenerate gemspec for version 0.6.3

burningpony/countries,thieunus/countries,hexorx/countries,Savedo/countries,GUI/countries,HomeStayTravel/countries,xronos-i-am/countries,musicglue/countries,fabn/countries,touristly/countries,nutmegdevelopment/countries,adriagalin/countries,dropstream/countries,7Dump/countries,charitywater/countries,tenforwardconsulting/countries,vcita/countries,jeffrey410469/countries,uzbekjon/countries,JuanitoFatas/countries,ohenrik/countries,aminin/countries,chargify/countries,namely/countries