sudo: false
language: ruby
rvm:
  - 2.3.4
  - 2.4.1
before_install: gem install bundler -v 1.15.1

sudo: false
language: ruby
rvm:
  - 2.6.3
  - 2.5.5
before_install: gem install bundler -v 1.17.3

Upgrade Travis configuration to reflect newer Ruby support
Upgrade Travis configuration to reflect newer Ruby support
