language: ruby
rvm:
  - 2.5.0
  - 2.4.3
  - 2.3.6
  - 2.2.9
gemfile:
  - gemfiles/4.2.gemfile
  - gemfiles/5.0.gemfile
  - gemfiles/5.1.gemfile

language: ruby
rvm:
  - 2.5.0
  - 2.4.3
gemfile:
  - gemfiles/4.2.gemfile
  - gemfiles/5.0.gemfile
  - gemfiles/5.1.gemfile

Remove Travis for Ruby < 2.4
Remove Travis for Ruby < 2.4

BigDecimal("invalid") raises on 2.4+ but is 0 on < 2.4.
