Fix type in travis config
Fix type in travis config

dhimmel/networkx,Sixshaman/networkx,nathania/networkx,beni55/networkx,dhimmel/networkx,wasade/networkx,sharifulgeo/networkx,jcurbelo/networkx,ltiao/networkx,sharifulgeo/networkx,harlowja/networkx,debsankha/networkx,ghdk/networkx,ghdk/networkx,yashu-seth/networkx,dmoliveira/networkx,farhaanbukhsh/networkx,farhaanbukhsh/networkx,andnovar/networkx,RMKD/networkx,ionanrozenfeld/networkx,tmilicic/networkx,michaelpacer/networkx,chrisnatali/networkx,jni/networkx,RMKD/networkx,aureooms/networkx,blublud/networkx,harlowja/networkx,jni/networkx,nathania/networkx,cmtm/networkx,blublud/networkx,chrisnatali/networkx,jni/networkx,dmoliveira/networkx,JamesClough/networkx,bzero/networkx,jakevdp/networkx,ionanrozenfeld/networkx,bzero/networkx,dhimmel/networkx,aureooms/networkx,jakevdp/networkx,ghdk/networkx,aureooms/networkx,debsankha/networkx,SanketDG/networkx,kernc/networkx,chrisnatali/networkx,bzero/networkx,RMKD/networkx,OrkoHunter/networkx,blublud/networkx,farhaanbukhsh/networkx,NvanAdrichem/networkx,jfinkels/networkx,kernc/networkx,nathania/networkx,jakevdp/networkx,ionanrozenfeld/networkx,dmoliveira/networkx,sharifulgeo/networkx,harlowja/networkx,kernc/networkx,debsankha/networkx,goulu/networkx