Update travis config to a supported version of Ruby
@@ -21,7 +21,7 @@ _bindings:
if: env(BUILD_ONLY) IS NOT present || env(BUILD_ONLY) =~ /python/
ruby: &ruby
language: ruby
- rvm: 2.3.8
+ rvm: 2.4
jdk: oraclejdk8
if: env(BUILD_ONLY) IS NOT present || env(BUILD_ONLY) =~ /ruby/
node: &node
