Add frozen_string_literal magic comment

re: https://www.rubydoc.info/gems/rubocop/RuboCop/Cop/Style/FrozenStringLiteralComment

lib/tasks/capitalize_colors.rake

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 namespace :data do
   desc 'Catitalize tracks, event types and difficult levels colors'
 

lib/tasks/cleardb.rake

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 namespace :db do
   desc 'setup DATABASE_URL from CLEARDB_DATABASE_URL in config/database.yml'
   task 'cleardb_env' do

lib/tasks/data.rake

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 namespace :data do
   desc 'Nullify wrong foreign keys'
 

lib/tasks/data_demo.rake

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 namespace :data do
   desc 'Create demo data using our factories'
   task demo: :environment do

lib/tasks/demo_data_for_development.rake

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 namespace :data do
   desc 'Create demo data for our local development'
   task test: :environment do

lib/tasks/dump_db.rake

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'yaml'
 task :dump_db do
   yaml = YAML.load_file("config/database.yml")

lib/tasks/event_attatchments.rake

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 namespace :db do
   desc 'Destroy event_attachments versions'
 

lib/tasks/events_registrations.rake

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 namespace :events_registrations do
   desc "Deletes dupicate entries"
   task deduplicate: :environment do

lib/tasks/factory_girl.rake

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 namespace :factory_girl do
   desc "Verify that all FactoryGirl factories are valid"
   task lint: :environment do

lib/tasks/logo.rake

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 namespace :data do
   namespace :migrate do
     desc 'Resize existing logo of sponsors after change in image manipulation specifications'

lib/tasks/migrate_config.rake

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 namespace :data do
   namespace :migrate do
     desc 'Create a dotenv file from config/config.yml'

lib/tasks/normalize_resources.rake

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 namespace :data do
   desc 'Update resources with nil quantity/used fields'
   task normalize_resources: :environment do

lib/tasks/roles.rake

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 namespace :roles do
   desc 'Adds back deleted roles to all conferences'
   task add: :environment do

lib/tasks/several_schedules.rake

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 namespace :data do
   desc 'Move the start_time and room attributes from Event to EventSchedule'
 

lib/tasks/user.rake

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 namespace :user do
   desc "Makes is_admin attribute true for user based on the supplied email address."
   task :admin, [:email] => :environment do |t, args|

lib/tasks/version.rake

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 namespace :data do
   desc 'Sets conference_id in all pre-existing PaperTrail::Version objects'
   task set_conference_in_versions: :environment do