Do not require faker gem by default

To save loading time.

Gemfile

@@ -260,7 +260,7 @@ end
 group :development do
   gem 'listen', '~> 3.7.0' # Use for event-based reloaders
 
-  gem 'faker'
+  gem 'faker', require: false
   gem 'letter_opener'
 
   gem 'spring'

lib/tasks/sample_data.rake

@@ -29,6 +29,8 @@
 namespace :sample_data do
   desc 'Create the given number of fake projects'
   task :projects, [:nr_of_projects] => :environment do |_task, args|
+    require 'faker'
+
     puts "Creating #{args[:nr_of_projects]} fake projects"
 
     args[:nr_of_projects].to_i.times do |i|