Don't build Travis doubly on PR
Don't build Travis doubly on PR

k0kubun/githubranking,k0kubun/github-ranking,k0kubun/githubranking,k0kubun/github-ranking,k0kubun/github-ranking,k0kubun/githubranking,k0kubun/github-ranking,k0kubun/githubranking,k0kubun/github-ranking,k0kubun/githubranking