update

db/migrate/20191126082849_create_users.rb

 class CreateUsers < ActiveRecord::Migration[6.0]
-  def up
+  def change
     create_table :users do |t|
       t.string :first_name
       t.string :last_name
@@ -48,8 +48,4 @@ class CreateUsers < ActiveRecord::Migration[6.0]
     # add_index :users, :confirmation_token,   unique: true
     # add_index :users, :unlock_token,         unique: true
   end
-
-  def down
-    drop_table :users
-  end
 end

db/migrate/20191126083110_create_jobs.rb

 class CreateJobs < ActiveRecord::Migration[6.0]
-  def up
+  def change
     create_table :jobs do |t|
       t.string :title
       t.string :level
@@ -16,8 +16,4 @@ class CreateJobs < ActiveRecord::Migration[6.0]
       t.timestamps
     end
   end
-
-  def down
-    drop_table :jobs
-  end
 end