add codecov code to travis.yml
add codecov code to travis.yml

Djenesis/contributr,SanketDG/contributr,Heasummn/contributr,Heasummn/contributr,troyleak/contributr,sofianugraha/contributr,troyleak/contributr,JoshAddington/contributr,Djenesis/contributr,kakorrhaphio/contributr,sofianugraha/contributr,iAmMrinal0/contributr,jherrlin/contributr,nickpolet/contributr,kakorrhaphio/contributr,nickpolet/contributr,jherrlin/contributr,abdullah2891/contributr,nickpolet/contributr,JoshAddington/contributr,abdullah2891/contributr,planetirf/contributr,troyleak/contributr,SanketDG/contributr,SanketDG/contributr,abdullah2891/contributr,npaul2811/contributr,kakorrhaphio/contributr,iAmMrinal0/contributr,sofianugraha/contributr,jherrlin/contributr,planetirf/contributr,Djenesis/contributr,npaul2811/contributr,JoshAddington/contributr,iAmMrinal0/contributr,Heasummn/contributr,planetirf/contributr,npaul2811/contributr