Relax bundler version for JRuby on Github Actions

It is using bundler-1.17.

1 files changed, 1 insertions, 1 deletions

diff --git a/Gemfile b/Gemfile
index 40bd4fe..ad819ef 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,7 +5,7 @@ group :development do
   gem 'rake-compiler', '~> 1.0.3'
   gem 'rake-compiler-dock', '~> 1.0'
   gem 'rspec', '~> 3.0'
-  gem 'bundler', '~> 2.0'
+  gem 'bundler', '>= 1.16', '< 3'
 end
 
 group :doc do