Workaround JRuby's jar-dependencies error on CI

Author: st0012

Gemfile

@@ -12,3 +12,6 @@ group :development do
   gem 'gettext'
   gem 'prism', '>= 0.30.0'
 end
+
+# Workaround for https://github.com/mkristian/jar-dependencies/issues/86
+gem "jar-dependencies", "~> 0.4.0", platform: :jruby