language: ruby
rvm:
  - 2.3
  - 2.4
  - 2.5

before_install:
  - gem update --system

cache: bundler

notifications:
  email:
    on_success: change

language: ruby
rvm:
  - 2.3
  ## https://travis-ci.org/AlexWayfer/flame/jobs/349907949
  ## https://bugs.ruby-lang.org/issues/13539
  - 2.4.3
  - 2.5

before_install:
  - gem update --system

cache: bundler

notifications:
  email:
    on_success: change

Set Ruby version `2.4.3` for Travis CI instead of `2.4`
Set Ruby version `2.4.3` for Travis CI instead of `2.4`

`2.4.1` is default in Travis CI for `2.4`,
but this version has bug: https://bugs.ruby-lang.org/issues/13539

Failed build: https://travis-ci.org/AlexWayfer/flame/jobs/349907949
