Require WEBrick for Ruby 3.0

Author: kou

fluent-plugin-groonga-query-log.gemspec

@@ -36,8 +36,9 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency("fluentd")
   spec.add_runtime_dependency("groonga-query-log", ">= 1.7.6")
 
-  spec.add_development_dependency("rake")
   spec.add_development_dependency("bundler")
   spec.add_development_dependency("packnga")
+  spec.add_development_dependency("rake")
   spec.add_development_dependency("test-unit")
+  spec.add_development_dependency("webrick")
 end