Please make elixir 1.8.0 in travis-ci test environment.
language: elixir
elixir: 1.8.0
should work. https://travis-ci.org/BanzaiMan/travis_production_test/builds/483310950#L279
What did you try?
https://travis-ci.org/getong/xlsxir/jobs/482958884
my travis.yml is
language: elixir
elixir:
- 1.4.5
- 1.5.3
- 1.6.6
- 1.7.4
- 1.8.0
sudo: false
before_script:
- mix deps.get
Looks like the OTP/Release requirement is different for this version. We will need to enforce OTP/Release 20.0.
should fix this issue.