dist: trusty
sudo: false

language: ruby
cache: bundler

rvm:
  - 2.3.4

branches:
  only:
    - master

before_install:
  - gem update bundler

bundler_args: --jobs 7

dist: trusty
sudo: false

language: ruby
cache: bundler

rvm:
  - 2.3.4

branches:
  only:
    - master

before_install:
  - "gem install bundler -v '~> 1.13'"

bundler_args: --jobs 7

Fix Travis builds: optimistic gem update clashing w/ pessimistic gem dependency
Fix Travis builds: optimistic gem update clashing w/ pessimistic gem dependency

Now that Bundler 2.0 exists, you can't do that.
