Fix: skip _common, _errors, etc.

Author: dblock

lib/tasks/web.rake

@@ -27,6 +27,7 @@ namespace :slack do
           Dir.glob('lib/slack/web/api/mixins/**/*.json')
         ].flatten.each_with_object({}) do |path, result|
           file_name = File.basename(path, '.json')
+          next if File.dirname(path).split('/').last.start_with?('_') # skip _common, _errors, etc.
           prefix = file_name.split('.')[0..-2].join('.')
           name = file_name.split('.')[-1]
           result[prefix] ||= {}