GithubHelper: Add Hash-Conversion operator to update_milestone

The change was done to make the method signature cleaner to call

Author: raafaelima

lib/fastlane/plugin/wpmreleasetoolkit/actions/common/close_milestone_action.rb

@@ -15,7 +15,7 @@ def self.run(params)
 
         UI.user_error!("Milestone #{milestone_title} not found.") if milestone.nil?
 
-        github_helper.update_milestone(repository: repository, number: milestone[:number], options: { state: 'closed' })
+        github_helper.update_milestone(repository: repository, number: milestone[:number], state: 'closed')
       end
 
       def self.description

lib/fastlane/plugin/wpmreleasetoolkit/actions/common/setfrozentag_action.rb

@@ -29,7 +29,7 @@ def self.run(params)
         end
 
         UI.message("New milestone: #{mile_title}")
-        github_helper.update_milestone(repository: repository, number: milestone[:number], options: { title: mile_title })
+        github_helper.update_milestone(repository: repository, number: milestone[:number], title: mile_title)
       end
 
       def self.is_frozen(milestone)

lib/fastlane/plugin/wpmreleasetoolkit/helper/github_helper.rb

@@ -189,7 +189,7 @@ def comment_on_pr(project_slug:, pr_number:, body:, reuse_identifier: SecureRand
       # @return [Milestone] A single milestone object
       # @see http://developer.github.com/v3/issues/milestones/#update-a-milestone
       #
-      def update_milestone(repository:, number:, options:)
+      def update_milestone(repository:, number:, **options)
         client.update_milestone(repository, number, options)
       end