v1.16: keep console v1.23 (#4510)

console gem v1.24 and v1.25 has some specification changes that
influence Fluentd.

Since they have nothing to do with vulnerability, we should keep
the version on v1.16 stable branch.

Signed-off-by: Daijiro Fukuda <fukuda@clear-code.com>

Author: daipom

fluentd.gemspec

@@ -29,6 +29,7 @@ Gem::Specification.new do |gem|
   gem.add_runtime_dependency("tzinfo-data", ["~> 1.0"])
   gem.add_runtime_dependency("strptime", [">= 0.2.4", "< 1.0.0"])
   gem.add_runtime_dependency("webrick", ["~> 1.4"])
+  gem.add_runtime_dependency("console", ["< 1.24"])
 
   # build gem for a certain platform. see also Rakefile
   fake_platform = ENV['GEM_BUILD_FAKE_PLATFORM'].to_s