GitHub API request failed: API rate limit exceeded for A.B.C.D

[cybertk]

make deps failed on Travis CI with

GitHub API request failed: API rate limit exceeded for 208.78.110.199. (But here's the good news: Authenticated requests get a higher rate limit. Check out the documentation for more details.)

See https://travis-ci.org/cybertk/CKPickerView#L133

[cybertk]

See https://developer.github.com/v3/#rate-limiting

[cybertk]

--use-ssh will get a higher rate limit

[--use-ssh]
    use SSH for downloading GitHub repositories

[cybertk]

--use-ssh seems does not work

[cybertk]

See Carthage/Carthage#605, Carthage fix this by introducing GITHUB_ACCESS_TOKEN environment var.