Revert "Override "script" in .travis.yml"
Revert "Override "script" in .travis.yml"

This reverts commit e8cfa60b41cb0f83ef7f08a040f882c3e89e51f6.

CodyGuo/elvish,ke7ofi/elvish,beni55/elvish,elves/elvish,elves/elvish,CodyGuo/elvish,elves/elvish,elves/elvish,elves/elvish,beni55/elvish,ke7ofi/elvish