Compatibility with newer ruby 2.x

.travis.yml

@@ -8,7 +8,11 @@ rvm:
   - "2.4"
   - "2.5"
   - "2.6"
+  - "2.7"
 
+before_install:
+  - ./cleanup_bundler
+  - gem install bundler -v '< 2'
 script:
   - bundle exec rake
   - bundle exec script/sync-readme-usage

aptible-cli.gemspec

@@ -30,6 +30,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'chronic_duration', '~> 0.10.6'
   spec.add_dependency 'cbor'
   spec.add_dependency 'aws-sdk', '~> 2.0'
+  spec.add_dependency 'bigdecimal', '~> 1.3.5' # https://github.com/ruby/bigdecimal#which-version-should-you-select
 
   # Temporarily pin ffi until https://github.com/ffi/ffi/issues/868 is fixed
   spec.add_dependency 'ffi', '<= 1.14.1' if Gem.win_platform?

cleanup_bundler

@@ -0,0 +1,14 @@
+#!/usr/bin/env ruby
+
+# Newer rubies have Bundler 2.x installed as default so it can't be deleted
+# We need Bundler 1.x
+
+gempaths = `gem env gempath`.split(':')
+gempaths.each do |gempath|
+  # lookup bundler-*.gemspec files and delete them
+  # this is the only way to completely cleanup default bundler
+  # Note: the bundler gemspecs' paths are different for CRuby and JRuby
+  Dir.glob(gempath.strip + '/specifications/**/bundler-*.gemspec').each do |p|
+    File.delete(p)
+  end
+end