Fix typo in .travis.yml
Fix typo in .travis.yml

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