Limit JRuby < 10 with 1.2.x

Author: kares

Rakefile

@@ -175,7 +175,7 @@ task :gem => [target_jar, target_jruby_rack, target_jruby_rack_version] do
       gem.email = ['[email protected]']
       gem.files = FileList["./**/*"].exclude("*.gem").map{ |f| f.sub(/^\.\//, '') }
       gem.homepage = %q{http://jruby.org}
-      gem.required_ruby_version = '>= 2.6.0' # JRuby >= 9.3
+      gem.required_ruby_version = ['>= 2.6.0', '< 3.2'] # JRuby >= 9.3 < 10
     end
 
     require 'rubygems/package'