Add missing specs for milestone model

app/models/milestone.rb

@@ -18,8 +18,8 @@ class Milestone < ActiveRecord::Base
   cache_markdown_field :description
 
   belongs_to :project
-  has_many :issues
   has_many :boards
+  has_many :issues
   has_many :labels, -> { distinct.reorder('labels.title') },  through: :issues
   has_many :merge_requests
   has_many :participants, -> { distinct.reorder('users.name') }, through: :issues, source: :assignee

spec/models/milestone_spec.rb

@@ -21,6 +21,8 @@ describe Milestone, models: true do
 
   describe "Associations" do
     it { is_expected.to belong_to(:project) }
+
+    it { is_expected.to have_many(:boards) }
     it { is_expected.to have_many(:issues) }
   end