fix(.travis.yml): pass '-y' option to upgrde. move 'make test' after updating gh-pages
fix(.travis.yml): pass '-y' option to upgrde. move 'make test' after updating gh-pages

leanprover/tutorial,cjmazey/fork_leanprover_tutorial,leanprover/tutorial,soonhokong/lean-tutorial,cjmazey/fork_leanprover_tutorial,avigad/tutorial,fpvandoorn/tutorial,cjmazey/fork_leanprover_tutorial,Hodapp87/cs6460_project,avigad/tutorial,fpvandoorn/tutorial,leanprover/tutorial,Hodapp87/cs6460_project,Hodapp87/cs6460_project,soonhokong/lean-tutorial,fpvandoorn/tutorial,avigad/tutorial,soonhokong/lean-tutorial