fix conflc

db/migrate/20200805075621_add_column_slug_to_table_cities.rb

+# frozen_string_literal: true
+
+class AddColumnSlugToTableCities < ActiveRecord::Migration[5.2]
+  def change
+    add_column :cities, :slug, :string
+  end
+end

db/migrate/20200805075629_add_column_slug_to_table_industries.rb

+class AddColumnSlugToTableIndustries < ActiveRecord::Migration[5.2]
+  def change
+    add_column :industries, :slug, :string
+  end
+end

db/migrate/20200805075807_add_column_slug_to_table_companies.rb

+class AddColumnSlugToTableCompanies < ActiveRecord::Migration[5.2]
+  def change
+    add_column :companies, :slug, :string
+  end
+end