Merge the "personal access token"-related migrations.

db/migrate/20160415062917_create_personal_access_tokens.rb

@@ -4,6 +4,8 @@ class CreatePersonalAccessTokens < ActiveRecord::Migration
       t.references :user, index: true, foreign_key: true, null: false
       t.string :token, index: {unique: true}, null: false
       t.string :name, null: false
+      t.boolean :revoked, default: false
+      t.datetime :expires_at
 
       t.timestamps null: false
     end

db/migrate/20160415144643_add_column_revoked_to_personal_access_tokens.rb

@@ -1,5 +0,0 @@
-class AddColumnRevokedToPersonalAccessTokens < ActiveRecord::Migration
-  def change
-    add_column :personal_access_tokens, :revoked, :boolean, default: false
-  end
-end

db/migrate/20160418085954_add_column_expires_at_to_personal_access_tokens.rb

@@ -1,5 +0,0 @@
-class AddColumnExpiresAtToPersonalAccessTokens < ActiveRecord::Migration
-  def change
-    add_column :personal_access_tokens, :expires_at, :datetime
-  end
-end